🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 11 (from laksa154)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa011.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.eso.org/public/images/eso1907a/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.eso.org/public/images/eso1907a/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.eso.org\/public\/images\/eso1907a\/","crawl_time":1775738776,"first_indexed_time":1554907850,"http_code":200,"src_unparsed":"org,eso!www,\/public\/images\/eso1907a\/ s443","src_root_hash":"1143827074280020011","history_drop_reason":null,"meta_title":"First Image of a Black Hole | ESO","meta_descriptions":["Image Archive","ESO, European Organisation for Astronomical Research in the Southern Hemisphere"],"attrs_boilerpipe_text":"The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capt\nure images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow.\nThe shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon.\nAlthough the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.\nCredit:\nEHT Collaboration\nAbout the Image\nId:\neso1907a\nType:\nObservation\nRelease date:\n10 April 2019, 15:07\nRelated releases:\neso2105\n,\neso1907\nRelated announcements:\nann19043\nSize:\n7416 x 4320 px\nAbout the Object\nCoordinates\nPosition (RA):\n12 30 49.42\nPosition (Dec):\n12&deg 23' 28.04\"\nField of view:\n0.00 x 0.00 arcminutes\nOrientation:\nNorth is 0.0° left of vertical\nView in WorldWide Telescope:\nColours & filters\nBand\nWavelength\nTelescope\nMillimeter\n1.3 mm\nEvent Horizon Telescope\nESO Cookies Policy\nThe European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.\nThis Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.\nWhat are cookies?\nCookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.\nCategories of cookies we use\nEssential cookies (always active)\n: These cookies are strictly necessary for the proper functioning of our website. 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While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.\npreferred_language\nLanguage settings.  We use this cookie to remember your preferred language settings.\n1\nst\nparty\nStored\n1 year\nON\n|\nOFF\nsessionid\nESO Shop.  We use this cookie to store your session information on the ESO Shop. This is just an identifier which is used on the server in order to allow you to purchase items in our shop.\n1\nst\nparty\nStored\n2 weeks\nON\n|\nOFF\nAnalytics cookies\n: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.\nMatomo Cookies\n:\nThis website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.\nOn behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.\nON\n|\nOFF\nMatomo cookies settings:\n_pk_id\nStores a unique visitor ID.\n1\nst\nparty\nStored\n13 months\n_pk_ses\nSession cookie temporarily stores data for the visit.\n1\nst\nparty\nStored\n30 minutes\n_pk_ref\nStores attribution information (the referrer that brought the visitor to the website).\n1\nst\nparty\nStored\n6 months\n_pk_testcookie\nTemporary cookie to check if a visitor’s browser supports cookies (set in Internet Explorer only).\n1\nst\nparty\nStored\nTemporary cookie that expires almost immediately after being set.\nAdditional Third-party cookies on ESO websites\n: some of our pages display content from external providers, e.g. YouTube.\nSuch third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.\nYouTube\n: Some videos on the ESO website are embedded from\nESO’s official YouTube channel\n. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s\nembedding videos information page\n.\nCookies can also be classified based on the following elements.\nRegarding the domain, there are:\nFirst-party cookies\n, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;\nThird-party cookies\n, set by a domain other than the one you are currently visiting.\nAs for their duration, cookies can be:\nBrowser-session cookies\n, which are deleted when the user closes the browser;\nStored cookies\n, which stay on the user's device for a predetermined period of time.\nHow to manage cookies\nCookie settings\n: You can modify your cookie choices for the ESO webpages at any time by clicking on the link\nCookie settings\nat the bottom of any page.\nIn your browser\n: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:\nBrave\nChrome\nEdge\nFirefox\nSafari\nPlease be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.\nYou can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site\/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).\nUpdates to the ESO Cookies Policy\nThe ESO Cookies Policy may be subject to future updates, which will be made available on this page.\nAdditional information\nFor any queries related to cookies, please contact: pdprATesoDOTorg.\nAs ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.","attrs_markdown":"Select Language (en)\n\n(en)\n\n- [International English](https:\/\/www.eso.org\/public\/images\/eso1907a\/?lang)\n- [Czechia](https:\/\/www.eso.org\/public\/czechia\/images\/eso1907a\/?lang)\n- [Dansk](https:\/\/www.eso.org\/public\/denmark\/images\/eso1907a\/?lang)\n- [Deutsch](https:\/\/www.eso.org\/public\/germany\/images\/eso1907a\/?lang)\n- [Deutsch (Belgien)](https:\/\/www.eso.org\/public\/belgium-de\/images\/eso1907a\/?lang)\n- [Deutsch (Schweiz)](https:\/\/www.eso.org\/public\/switzerland-de\/images\/eso1907a\/?lang)\n- [Deutsch (Österreich)](https:\/\/www.eso.org\/public\/austria\/images\/eso1907a\/?lang)\n- [English (Australia)](https:\/\/www.eso.org\/public\/australia\/images\/eso1907a\/?lang)\n- [English (Ireland)](https:\/\/www.eso.org\/public\/ireland\/images\/eso1907a\/?lang)\n- [English (UK)](https:\/\/www.eso.org\/public\/unitedkingdom\/images\/eso1907a\/?lang)\n- [Español](https:\/\/www.eso.org\/public\/spain\/images\/eso1907a\/?lang)\n- [Español (Chile)](https:\/\/www.eso.org\/public\/chile\/images\/eso1907a\/?lang)\n- [Français](https:\/\/www.eso.org\/public\/france\/images\/eso1907a\/?lang)\n- [Français (Belgique)](https:\/\/www.eso.org\/public\/belgium-fr\/images\/eso1907a\/?lang)\n- [Français (Suisse)](https:\/\/www.eso.org\/public\/switzerland-fr\/images\/eso1907a\/?lang)\n- [Italiano](https:\/\/www.eso.org\/public\/italy\/images\/eso1907a\/?lang)\n- [Italiano (Svizzera)](https:\/\/www.eso.org\/public\/switzerland-it\/images\/eso1907a\/?lang)\n- [Nederlands](https:\/\/www.eso.org\/public\/netherlands\/images\/eso1907a\/?lang)\n- [Nederlands (België)](https:\/\/www.eso.org\/public\/belgium-nl\/images\/eso1907a\/?lang)\n- [Polski](https:\/\/www.eso.org\/public\/poland\/images\/eso1907a\/?lang)\n- [Português](https:\/\/www.eso.org\/public\/portugal\/images\/eso1907a\/?lang)\n- [Suomi](https:\/\/www.eso.org\/public\/finland\/images\/eso1907a\/?lang)\n- [Svenska](https:\/\/www.eso.org\/public\/sweden\/images\/eso1907a\/?lang)\n\n[Science](https:\/\/www.eso.org\/sci.html) [User Portal](https:\/\/www.eso.org\/UserPortal\/)\n\n[Subscribe](https:\/\/www.eso.org\/public\/outreach\/newsletters\/esonews\/) [Contact](https:\/\/www.eso.org\/public\/about-eso\/travel\/) [Site Map](https:\/\/www.eso.org\/public\/sitemap\/)\n\nOpen Menu\n\n- [About](https:\/\/www.eso.org\/public\/about-eso\/)\n  - 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[The VISTA surveys](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vista\/surveys\/)\n        - [The VISTA consortium](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vista\/consortium\/)\n      - [VST](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vst\/)\n        - [The VST mirrors](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vst\/mirror\/)\n        - [OmegaCAM](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vst\/camera\/)\n        - [The VST surveys](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/surveytelescopes\/vst\/surveys\/)\n    - [SPECULOOS](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/speculoos\/)\n    - [NGTS](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/ngts\/)\n    - [Cherenkov Telescope Array Observatory](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/ctao\/)\n    - [OASIS](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/oasis\/)\n    - [PoET](https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/poet\/)\n  - [La Silla Observatory](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/)\n    - [Swedish–ESO Submillimetre Telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/swedish\/)\n    - [New Technology Telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/ntt\/)\n      - [EFOSC2](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/ntt\/efosc2\/)\n      - [SOFI](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/ntt\/sofi\/)\n      - [SOXS](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/ntt\/soxs\/)\n    - [ESO 3.6-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/36\/)\n      - [HARPS](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/36\/harps\/)\n      - [NIRPS](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/36\/nirps\/)\n    - [MPG\/ESO 2.2-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/mpg22\/)\n      - [FEROS](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/mpg22\/feros\/)\n      - [GROND](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/mpg22\/grond\/)\n      - [WFI](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/mpg22\/wfi\/)\n    - [Swiss 1.2-metre Leonhard Euler Telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/swiss\/)\n      - [CORALIE](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/swiss\/coralie\/)\n    - [Rapid Eye Mount telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/rem\/)\n    - [TRAnsiting Planets and PlanetesImals Small Telescope–South](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/trappist\/)\n    - [Danish 1.54-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/danish154\/)\n      - [DFOSC](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/danish154\/dfosc\/)\n    - [Télescope à Action Rapide pour les Objets Transitoires](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/tarot\/)\n    - [ESO 1-metre Schmidt telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/1mschmidt\/)\n    - [ESO 1.52-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/152metre\/)\n    - [ESO 1-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/1metre\/)\n      - [FIDEOS](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/1metre\/fideos\/)\n    - [ESO 0.5-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/05metre\/)\n    - [Coudé Auxiliary Telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/coude\/)\n    - [MarLy 1-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/marly\/)\n    - [Dutch 0.9-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/09metre\/)\n    - [Swiss T70 telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/t70\/)\n    - [Bochum 0.61-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/bochum\/)\n    - [Danish 0.5-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/danish05\/)\n    - [Grand Prisme Objectif telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/gpo\/)\n    - [Swiss 0.4-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/swiss04\/)\n    - [Marseille 0.36-metre telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/marseille\/)\n    - [GRB Monitoring System](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/grb\/)\n    - [MASCARA](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/mascara\/)\n    - [BlackGEM](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/blackgem\/)\n    - [ExTrA](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/extra\/)\n    - [Test-Bed Telescope](https:\/\/www.eso.org\/public\/teles-instr\/lasilla\/test-bed\/)\n  - [ALMA](https:\/\/www.eso.org\/public\/teles-instr\/alma\/)\n    - [Antennas](https:\/\/www.eso.org\/public\/teles-instr\/alma\/antennas\/)\n    - [Transporters](https:\/\/www.eso.org\/public\/teles-instr\/alma\/transporters\/)\n    - [Interferometry](https:\/\/www.eso.org\/public\/teles-instr\/alma\/interferometry\/)\n    - [Receiver Bands](https:\/\/www.eso.org\/public\/teles-instr\/alma\/receiver-bands\/)\n    - [ALMA Residencia](https:\/\/www.eso.org\/public\/teles-instr\/alma\/residencia\/)\n    - [Wideband Sensitivity Upgrade](https:\/\/www.eso.org\/public\/teles-instr\/alma\/wsu\/)\n    - [APEX](https:\/\/www.eso.org\/public\/teles-instr\/apex\/)\n  - [ELT](https:\/\/www.eso.org\/public\/teles-instr\/elt\/)\n  - [Technology for Telescopes](https:\/\/www.eso.org\/public\/teles-instr\/technology\/)\n    - [Active Optics](https:\/\/www.eso.org\/public\/teles-instr\/technology\/active_optics\/)\n    - [Adaptive Optics](https:\/\/www.eso.org\/public\/teles-instr\/technology\/adaptive_optics\/)\n    - [Integral Field Units](https:\/\/www.eso.org\/public\/teles-instr\/technology\/ifu\/)\n    - [Interferometry](https:\/\/www.eso.org\/public\/teles-instr\/technology\/interferometry\/)\n    - [Spectroscopy](https:\/\/www.eso.org\/public\/teles-instr\/technology\/spectroscopy\/)\n    - [Polarimetry](https:\/\/www.eso.org\/public\/teles-instr\/technology\/polarimetry\/)\n  - [Instruments](https:\/\/www.eso.org\/public\/teles-instr\/instruments\/)\n- [Discoveries](https:\/\/www.eso.org\/public\/science\/)\n  - [ESO Key Astronomical Discoveries](https:\/\/www.eso.org\/public\/science\/key-discoveries\/)\n  - [Exoplanets](https:\/\/www.eso.org\/public\/science\/exoplanets\/)\n  - [Gravitational Wave Sources](https:\/\/www.eso.org\/public\/science\/gravitationalwaves\/)\n  - [Black Holes](https:\/\/www.eso.org\/public\/images\/eso1907a\/)\n    - [First image of a black hole](https:\/\/www.eso.org\/public\/science\/event-horizon\/)\n    - [First image of the Milky Way central black hole](https:\/\/www.eso.org\/public\/science\/EHT-MilkyWay\/)\n    - [More about the black hole at the galactic centre](https:\/\/www.eso.org\/public\/science\/gc\/)\n  - [Gamma-Ray Bursts](https:\/\/www.eso.org\/public\/science\/grb\/)\n  - [Science Archive](https:\/\/www.eso.org\/public\/science\/archive\/)\n- [Events](https:\/\/www.eso.org\/public\/events\/)\n  - [Exhibitions](https:\/\/www.eso.org\/public\/events\/exhibitions\/)\n    - 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[Order in ESOshop](https:\/\/www.eso.org\/public\/shop\/)\n- [Business@ESO](https:\/\/www.eso.org\/public\/industry\/)\n  - [Procurement at ESO](https:\/\/www.eso.org\/public\/industry\/cp.html)\n  - [Industry Events](https:\/\/www.eso.org\/public\/industry\/events\/)\n  - [Technology Transfer](https:\/\/www.eso.org\/public\/industry\/techtrans\/)\n    - [Technology Developed by Industries](https:\/\/www.eso.org\/public\/industry\/techtrans\/technology-developed-by-industry-or-institutes\/)\n    - [Novel technologies by ESO](https:\/\/www.eso.org\/public\/industry\/techtrans\/develeso\/)\n    - [ESO know-how](https:\/\/www.eso.org\/public\/industry\/techtrans\/developments\/)\n  - [Projects](https:\/\/www.eso.org\/public\/industry\/projects\/)\n  - [Contact Information](https:\/\/www.eso.org\/public\/industry\/contact\/)\n- [Career Opportunities](https:\/\/recruitment.eso.org\/)\n  - [Recruitment](https:\/\/recruitment.eso.org\/)\n  - [Employment Conditions](https:\/\/www.eso.org\/public\/jobs\/conditions\/)\n    - [International Staff Members](https:\/\/www.eso.org\/public\/jobs\/conditions\/intstaff\/)\n    - [Local Staff Members (Spanish \/ English)](https:\/\/www.eso.org\/public\/jobs\/conditions\/localstaff\/)\n    - [Fellows](https:\/\/www.eso.org\/public\/jobs\/conditions\/fellows\/)\n    - [Students](https:\/\/www.eso.org\/public\/jobs\/conditions\/students\/)\n    - [Paid Associates](https:\/\/www.eso.org\/public\/jobs\/conditions\/paidassoc\/)\n  - [Working at ESO](https:\/\/www.eso.org\/public\/jobs\/working-at-eso\/)\n  - [Other Information](https:\/\/www.eso.org\/public\/jobs\/other-information\/)\n\n[European Southern Observatory](https:\/\/www.eso.org\/public\/)\n\n# First Image of a Black Hole\n[![First Image of a Black Hole](https:\/\/cdn.eso.org\/images\/thumb700x\/eso1907a.jpg)](https:\/\/cdn.eso.org\/images\/screen\/eso1907a.jpg \"First Image of a Black Hole\")\n\nThe Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow.\n\nThe shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon.\n\nAlthough the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.\n\n**Credit:**\n\nEHT Collaboration\n\n[Usage of ESO Images, Videos, Web texts and Music](https:\/\/www.eso.org\/public\/outreach\/copyright\/)  \n[Are you a journalist? Subscribe to the ESO Media Newsletter in your language.](https:\/\/www.eso.org\/public\/outreach\/pressmedia\/#epodpress_form)\n\n### About the Image\n|   |   |\n|---|---|\n| Id: | eso1907a |\n| Type: | Observation |\n| Release date: | 10 April 2019, 15:07 |\n| Related releases: | [eso2105](https:\/\/www.eso.org\/public\/news\/eso2105\/), [eso1907](https:\/\/www.eso.org\/public\/news\/eso1907\/) |\n| Related announcements: | [ann19043](https:\/\/www.eso.org\/public\/announcements\/ann19043\/) |\n| Size: | 7416 x 4320 px |\n***\n### About the Object\n|   |   |\n|---|---|\n| Name: | [M87\\*](https:\/\/en.wikipedia.org\/wiki\/Messier_87#Supermassive_black_hole), [Messier 87](https:\/\/simbad.u-strasbg.fr\/simbad\/sim-id?Ident=Messier+87) |\n| Type: | Local Universe : Galaxy : Component : Central Black Hole |\n| Constellation: | Virgo |\n| Category: | [Quasars and Black Holes](https:\/\/www.eso.org\/public\/images\/archive\/category\/blackholes\/) |\n***\n\n### Image Formats\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_phot.1785b79e10fb.png)[Fullsize Original](https:\/\/cdn.eso.org\/images\/original\/eso1907a.tif)\n\n183\\.4 MB [checksum]()\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_phot.1785b79e10fb.png)[Large JPEG](https:\/\/cdn.eso.org\/images\/large\/eso1907a.jpg)\n\n7\\.7 MB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_phot.1785b79e10fb.png)[Publication TIFF 4K](https:\/\/cdn.eso.org\/images\/publicationtiff\/eso1907a.tif)\n\n8\\.3 MB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_phot.1785b79e10fb.png)[Publication JPEG](https:\/\/cdn.eso.org\/images\/publicationjpg\/eso1907a.jpg)\n\n403\\.5 KB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_phot.1785b79e10fb.png)[Screensize JPEG](https:\/\/cdn.eso.org\/images\/screen\/eso1907a.jpg)\n\n39\\.8 KB\n***\n\n### Zoomable\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_zoom.f6f6ae27d272.png)[Zoomable](https:\/\/www.eso.org\/public\/images\/eso1907a\/zoomable\/)\n***\n\n### Wallpapers\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_slides.a4554b88fd91.png)[1024x768](https:\/\/cdn.eso.org\/images\/wallpaper1\/eso1907a.jpg)\n\n53\\.8 KB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_slides.a4554b88fd91.png)[1280x1024](https:\/\/cdn.eso.org\/images\/wallpaper2\/eso1907a.jpg)\n\n72\\.6 KB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_slides.a4554b88fd91.png)[1600x1200](https:\/\/cdn.eso.org\/images\/wallpaper3\/eso1907a.jpg)\n\n92\\.6 KB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_slides.a4554b88fd91.png)[1920x1200](https:\/\/cdn.eso.org\/images\/wallpaper4\/eso1907a.jpg)\n\n98\\.5 KB\n\n![](https:\/\/www.eso.org\/public\/archives\/djp\/icons\/icon_slides.a4554b88fd91.png)[2048x1536](https:\/\/cdn.eso.org\/images\/wallpaper5\/eso1907a.jpg)\n\n144\\.7 KB\n***\n\n### Coordinates\n|   |   |\n|---|---|\n| Position (RA): | 12 30 49.42 |\n| Position (Dec): | 12\\&deg 23' 28.04\" |\n| Field of view: | 0\\.00 x 0.00 arcminutes |\n| Orientation: | North is 0.0° left of vertical |\n\nView in WorldWide Telescope:\n\n[![View in WorldWide Telescope](https:\/\/www.eso.org\/public\/archives\/wwt.png)](http:\/\/www.worldwidetelescope.org\/wwtweb\/ShowImage.aspx?scale=2.18508961573e-07&name=M87%2A&imageurl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fscreen%2Feso1907a.jpg&credits=&creditsUrl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Fimages%2Feso1907a%2F&ra=187.70593075&y=523.323319222&x=645.349520276&rotation=180.0&dec=12.39112325&thumb=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fthumbs%2Feso1907a.jpg \"View in WorldWide Telescope\")\n\n### Colours & filters\n| Band | Wavelength | Telescope |\n|---|---|---|\n| Millimeter | 1\\.3 mm | [Event Horizon Telescope](https:\/\/eventhorizontelescope.org\/) |\n\n[Send us your comments\\!](mailto:information@eso.org)\n\n[Subscribe to receive news from ESO in your language](https:\/\/www.eso.org\/public\/outreach\/newsletters\/esonews\/)\n\n[Accelerated by CDN77](https:\/\/www.cdn77.com\/)\n\n[Terms & Conditions](https:\/\/www.eso.org\/public\/about-eso\/privacy\/)\n\nCookie Settings and Policy\n\n# Our use of Cookies\nWe use cookies that are essential for accessing our websites and using our services. 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We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.\n\nOn behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.\n\nON \\| OFF\n\nMatomo cookies settings:\n\nCookie ID\/Name\n\nDescription\/Purpose\n\nProvider (1st party or 3rd party)\n\nBrowser session cookie or Stored cookie?\n\nDuration\n\nSettings\n\n\\_pk\\_id\n\nStores a unique visitor ID.\n\n1st party\n\nStored\n\n13 months\n\n\\_pk\\_ses\n\nSession cookie temporarily stores data for the visit.\n\n1st party\n\nStored\n\n30 minutes\n\n\\_pk\\_ref\n\nStores attribution information (the referrer that brought the visitor to the website).\n\n1st party\n\nStored\n\n6 months\n\n\\_pk\\_testcookie\n\nTemporary cookie to check if a visitor’s browser supports cookies (set in Internet Explorer only).\n\n1st party\n\nStored\n\nTemporary cookie that expires almost immediately after being set.\n\nAdditional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.\n\nSuch third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.\n\n[YouTube](https:\/\/www.youtube.com\/t\/terms): Some videos on the ESO website are embedded from [ESO’s official YouTube channel](https:\/\/www.youtube.com\/channel\/UCIhYoC2VIAJqCkoIWNHBQ3Q). We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s [embedding videos information page](https:\/\/support.google.com\/youtube\/answer\/171780?hl=en-GB).\n\nCookies can also be classified based on the following elements.\n\nRegarding the domain, there are:\n\n- First-party cookies, set by the website you are currently visiting. 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And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).\n\n## Updates to the ESO Cookies Policy\nThe ESO Cookies Policy may be subject to future updates, which will be made available on this page.\n\n## Additional information\nFor any queries related to cookies, please contact: pdprATesoDOTorg.\n\nAs ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.\n\nSave\n\nCancel","attrs_readable_markdown":"The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow.\n\nThe shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon.\n\nAlthough the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.\n\n**Credit:**\n\nEHT Collaboration\n\n### About the Image\n|   |   |\n|---|---|\n| Id: | eso1907a |\n| Type: | Observation |\n| Release date: | 10 April 2019, 15:07 |\n| Related releases: | [eso2105](https:\/\/www.eso.org\/public\/news\/eso2105\/), [eso1907](https:\/\/www.eso.org\/public\/news\/eso1907\/) |\n| Related announcements: | [ann19043](https:\/\/www.eso.org\/public\/announcements\/ann19043\/) |\n| Size: | 7416 x 4320 px |\n***\n### About the Object\n***\n\n### Coordinates\n|   |   |\n|---|---|\n| Position (RA): | 12 30 49.42 |\n| Position (Dec): | 12\\&deg 23' 28.04\" |\n| Field of view: | 0\\.00 x 0.00 arcminutes |\n| Orientation: | North is 0.0° left of vertical |\n\nView in WorldWide Telescope:\n\n[![View in WorldWide Telescope](https:\/\/www.eso.org\/public\/archives\/wwt.png)](http:\/\/www.worldwidetelescope.org\/wwtweb\/ShowImage.aspx?scale=2.18508961573e-07&name=M87%2A&imageurl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fscreen%2Feso1907a.jpg&credits=&creditsUrl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Fimages%2Feso1907a%2F&ra=187.70593075&y=523.323319222&x=645.349520276&rotation=180.0&dec=12.39112325&thumb=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fthumbs%2Feso1907a.jpg \"View in WorldWide Telescope\")\n\n### Colours & filters\n| Band | Wavelength | Telescope |\n|---|---|---|\n| Millimeter | 1\\.3 mm | [Event Horizon Telescope](https:\/\/eventhorizontelescope.org\/) |\n\n## ESO Cookies Policy\nThe European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.\n\nThis Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.\n\n## What are cookies?\nCookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.\n\n## Categories of cookies we use\nEssential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.\n\ncsrftoken\n\nXSRF protection token. We use this cookie to protect against cross-site request forgery attacks.\n\n1st party\n\nStored\n\n1 year\n\nuser\\_privacy\n\nYour privacy choices. We use this cookie to save your privacy preferences.\n\n1st party\n\nStored\n\n6 months\n\n\\_grecaptcha\n\nWe use reCAPTCHA to protect our forms against spam and abuse. reCAPTCHA sets a necessary cookie when executed for the purpose of providing its risk analysis. We use www.recaptcha.net instead of www.google.com in order to avoid unnecessary cookies from Google.\n\n3rd party\n\nStored\n\n6 months\n\nFunctional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.\n\npreferred\\_language\n\nLanguage settings. We use this cookie to remember your preferred language settings.\n\n1st party\n\nStored\n\n1 year\n\nON \\| OFF\n\nsessionid\n\nESO Shop. We use this cookie to store your session information on the ESO Shop. This is just an identifier which is used on the server in order to allow you to purchase items in our shop.\n\n1st party\n\nStored\n\n2 weeks\n\nON \\| OFF\n\nAnalytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. 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These data will not be disclosed to third parties.\n\nOn behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.\n\nON \\| OFF\n\nMatomo cookies settings:\n\n\\_pk\\_id\n\nStores a unique visitor ID.\n\n1st party\n\nStored\n\n13 months\n\n\\_pk\\_ses\n\nSession cookie temporarily stores data for the visit.\n\n1st party\n\nStored\n\n30 minutes\n\n\\_pk\\_ref\n\nStores attribution information (the referrer that brought the visitor to the website).\n\n1st party\n\nStored\n\n6 months\n\n\\_pk\\_testcookie\n\nTemporary cookie to check if a visitor’s browser supports cookies (set in Internet Explorer only).\n\n1st party\n\nStored\n\nTemporary cookie that expires almost immediately after being set.\n\nAdditional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.\n\nSuch third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.\n\n[YouTube](https:\/\/www.youtube.com\/t\/terms): Some videos on the ESO website are embedded from [ESO’s official YouTube channel](https:\/\/www.youtube.com\/channel\/UCIhYoC2VIAJqCkoIWNHBQ3Q). 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And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).\n\n## Updates to the ESO Cookies Policy\nThe ESO Cookies Policy may be subject to future updates, which will be made available on this page.\n\n## Additional information\nFor any queries related to cookies, please contact: pdprATesoDOTorg.\n\nAs ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.","meta_canonical":null}

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URL	https://www.eso.org/public/images/eso1907a/
Last Crawled	2026-04-09 12:46:16 (5 hours ago)
First Indexed	2019-04-10 14:50:50 (7 years ago)
HTTP Status Code	200
Meta Title	First Image of a Black Hole \| ESO
Meta Description	Image Archive, ESO, European Organisation for Astronomical Research in the Southern Hemisphere
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Boilerpipe Text	The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capt ure images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration. Credit: EHT Collaboration About the Image Id: eso1907a Type: Observation Release date: 10 April 2019, 15:07 Related releases: eso2105 , eso1907 Related announcements: ann19043 Size: 7416 x 4320 px About the Object Coordinates Position (RA): 12 30 49.42 Position (Dec): 12&deg 23' 28.04" Field of view: 0.00 x 0.00 arcminutes Orientation: North is 0.0° left of vertical View in WorldWide Telescope: Colours & filters Band Wavelength Telescope Millimeter 1.3 mm Event Horizon Telescope ESO Cookies Policy The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy. This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details. What are cookies? Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience. Categories of cookies we use Essential cookies (always active) : These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled. csrftoken XSRF protection token. We use this cookie to protect against cross-site request forgery attacks. 1 st party Stored 1 year user_privacy Your privacy choices. We use this cookie to save your privacy preferences. 1 st party Stored 6 months _grecaptcha We use reCAPTCHA to protect our forms against spam and abuse. reCAPTCHA sets a necessary cookie when executed for the purpose of providing its risk analysis. We use www.recaptcha.net instead of www.google.com in order to avoid unnecessary cookies from Google. 3 rd party Stored 6 months Functional Cookies : These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent. preferred_language Language settings. We use this cookie to remember your preferred language settings. 1 st party Stored 1 year ON \| OFF sessionid ESO Shop. We use this cookie to store your session information on the ESO Shop. This is just an identifier which is used on the server in order to allow you to purchase items in our shop. 1 st party Stored 2 weeks ON \| OFF Analytics cookies : These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies. Matomo Cookies : This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties. On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage. ON \| OFF Matomo cookies settings: _pk_id Stores a unique visitor ID. 1 st party Stored 13 months _pk_ses Session cookie temporarily stores data for the visit. 1 st party Stored 30 minutes _pk_ref Stores attribution information (the referrer that brought the visitor to the website). 1 st party Stored 6 months _pk_testcookie Temporary cookie to check if a visitor’s browser supports cookies (set in Internet Explorer only). 1 st party Stored Temporary cookie that expires almost immediately after being set. Additional Third-party cookies on ESO websites : some of our pages display content from external providers, e.g. YouTube. Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc. YouTube : Some videos on the ESO website are embedded from ESO’s official YouTube channel . We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page . Cookies can also be classified based on the following elements. Regarding the domain, there are: First-party cookies , set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site; Third-party cookies , set by a domain other than the one you are currently visiting. As for their duration, cookies can be: Browser-session cookies , which are deleted when the user closes the browser; Stored cookies , which stay on the user's device for a predetermined period of time. How to manage cookies Cookie settings : You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page. In your browser : If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser: Brave Chrome Edge Firefox Safari Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected. You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out). Updates to the ESO Cookies Policy The ESO Cookies Policy may be subject to future updates, which will be made available on this page. Additional information For any queries related to cookies, please contact: pdprATesoDOTorg. As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.
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In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration. Credit: EHT Collaboration [Usage of ESO Images, Videos, Web texts and Music](https://www.eso.org/public/outreach/copyright/) [Are you a journalist? Subscribe to the ESO Media Newsletter in your language.](https://www.eso.org/public/outreach/pressmedia/#epodpress_form) ### About the Image \| \| \| \|---\|---\| \| Id: \| eso1907a \| \| Type: \| Observation \| \| Release date: \| 10 April 2019, 15:07 \| \| Related releases: \| [eso2105](https://www.eso.org/public/news/eso2105/), [eso1907](https://www.eso.org/public/news/eso1907/) \| \| Related announcements: \| [ann19043](https://www.eso.org/public/announcements/ann19043/) \| \| Size: \| 7416 x 4320 px \| *** ### About the Object \| \| \| \|---\|---\| \| Name: \| [M87\](https://en.wikipedia.org/wiki/Messier_87#Supermassive_black_hole), [Messier 87](https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Messier+87) \| \| Type: \| Local Universe : Galaxy : Component : Central Black Hole \| \| Constellation: \| Virgo \| \| Category: \| [Quasars and Black Holes](https://www.eso.org/public/images/archive/category/blackholes/) \| ### Image Formats ![](https://www.eso.org/public/archives/djp/icons/icon_phot.1785b79e10fb.png)[Fullsize Original](https://cdn.eso.org/images/original/eso1907a.tif) 183\.4 MB [checksum]() ![](https://www.eso.org/public/archives/djp/icons/icon_phot.1785b79e10fb.png)[Large JPEG](https://cdn.eso.org/images/large/eso1907a.jpg) 7\.7 MB ![](https://www.eso.org/public/archives/djp/icons/icon_phot.1785b79e10fb.png)[Publication TIFF 4K](https://cdn.eso.org/images/publicationtiff/eso1907a.tif) 8\.3 MB ![](https://www.eso.org/public/archives/djp/icons/icon_phot.1785b79e10fb.png)[Publication JPEG](https://cdn.eso.org/images/publicationjpg/eso1907a.jpg) 403\.5 KB ![](https://www.eso.org/public/archives/djp/icons/icon_phot.1785b79e10fb.png)[Screensize JPEG](https://cdn.eso.org/images/screen/eso1907a.jpg) 39\.8 KB * ### Zoomable ![](https://www.eso.org/public/archives/djp/icons/icon_zoom.f6f6ae27d272.png)[Zoomable](https://www.eso.org/public/images/eso1907a/zoomable/) * ### Wallpapers ![](https://www.eso.org/public/archives/djp/icons/icon_slides.a4554b88fd91.png)[1024x768](https://cdn.eso.org/images/wallpaper1/eso1907a.jpg) 53\.8 KB ![](https://www.eso.org/public/archives/djp/icons/icon_slides.a4554b88fd91.png)[1280x1024](https://cdn.eso.org/images/wallpaper2/eso1907a.jpg) 72\.6 KB ![](https://www.eso.org/public/archives/djp/icons/icon_slides.a4554b88fd91.png)[1600x1200](https://cdn.eso.org/images/wallpaper3/eso1907a.jpg) 92\.6 KB ![](https://www.eso.org/public/archives/djp/icons/icon_slides.a4554b88fd91.png)[1920x1200](https://cdn.eso.org/images/wallpaper4/eso1907a.jpg) 98\.5 KB ![](https://www.eso.org/public/archives/djp/icons/icon_slides.a4554b88fd91.png)[2048x1536](https://cdn.eso.org/images/wallpaper5/eso1907a.jpg) 144\.7 KB * ### Coordinates \| \| \| \|---\|---\| \| Position (RA): \| 12 30 49.42 \| \| Position (Dec): \| 12\&deg 23' 28.04" \| \| Field of view: \| 0\.00 x 0.00 arcminutes \| \| Orientation: \| North is 0.0° left of vertical \| View in WorldWide Telescope: [![View in WorldWide Telescope](https://www.eso.org/public/archives/wwt.png)](http://www.worldwidetelescope.org/wwtweb/ShowImage.aspx?scale=2.18508961573e-07&name=M87%2A&imageurl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fscreen%2Feso1907a.jpg&credits=&creditsUrl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Fimages%2Feso1907a%2F&ra=187.70593075&y=523.323319222&x=645.349520276&rotation=180.0&dec=12.39112325&thumb=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fthumbs%2Feso1907a.jpg "View in WorldWide Telescope") ### Colours & filters \| Band \| Wavelength \| Telescope \| \|---\|---\|---\| \| Millimeter \| 1\.3 mm \| [Event Horizon Telescope](https://eventhorizontelescope.org/) \| [Send us your comments\!](mailto:information@eso.org) [Subscribe to receive news from ESO in your language](https://www.eso.org/public/outreach/newsletters/esonews/) [Accelerated by CDN77](https://www.cdn77.com/) [Terms & Conditions](https://www.eso.org/public/about-eso/privacy/) Cookie Settings and Policy # Our use of Cookies We use cookies that are essential for accessing our websites and using our services. 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Readable Markdown	The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration. Credit: EHT Collaboration ### About the Image \| \| \| \|---\|---\| \| Id: \| eso1907a \| \| Type: \| Observation \| \| Release date: \| 10 April 2019, 15:07 \| \| Related releases: \| [eso2105](https://www.eso.org/public/news/eso2105/), [eso1907](https://www.eso.org/public/news/eso1907/) \| \| Related announcements: \| [ann19043](https://www.eso.org/public/announcements/ann19043/) \| \| Size: \| 7416 x 4320 px \| * ### About the Object * ### Coordinates \| \| \| \|---\|---\| \| Position (RA): \| 12 30 49.42 \| \| Position (Dec): \| 12\&deg 23' 28.04" \| \| Field of view: \| 0\.00 x 0.00 arcminutes \| \| Orientation: \| North is 0.0° left of vertical \| View in WorldWide Telescope: [![View in WorldWide Telescope](https://www.eso.org/public/archives/wwt.png)](http://www.worldwidetelescope.org/wwtweb/ShowImage.aspx?scale=2.18508961573e-07&name=M87%2A&imageurl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fscreen%2Feso1907a.jpg&credits=&creditsUrl=https%3A%2F%2Fwww.eso.org%2Fpublic%2Fimages%2Feso1907a%2F&ra=187.70593075&y=523.323319222&x=645.349520276&rotation=180.0&dec=12.39112325&thumb=https%3A%2F%2Fwww.eso.org%2Fpublic%2Farchives%2Fimages%2Fthumbs%2Feso1907a.jpg "View in WorldWide Telescope") ### Colours & filters \| Band \| Wavelength \| Telescope \| \|---\|---\|---\| \| Millimeter \| 1\.3 mm \| [Event Horizon Telescope](https://eventhorizontelescope.org/) \| ## ESO Cookies Policy The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy. This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details. ## What are cookies? Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience. ## Categories of cookies we use Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. 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While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent. preferred\_language Language settings. We use this cookie to remember your preferred language settings. 1st party Stored 1 year ON \\| OFF sessionid ESO Shop. We use this cookie to store your session information on the ESO Shop. This is just an identifier which is used on the server in order to allow you to purchase items in our shop. 1st party Stored 2 weeks ON \\| OFF Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies. 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Shard	11 (laksa)
Root Hash	1143827074280020011
Unparsed URL	org,eso!www,/public/images/eso1907a/ s443