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The 2009-2013 observations consist of far less data than the ones performed in 2017, making it impossible to create an image. – But those results were based only on observations performed throughout a one-week window in April 2017, which is far too short to see a lot of changes.Based on last year’s results we asked the following questions: is this crescent-like morphology consistent with the archival data? Would the archival data indicate a similar size and orientation of the crescent? – Last year we saw an image of the shadow of a black hole, consisting of a bright crescent formed by hot plasma swirling around M87*, and a dark central part, where we expect the event horizon of the black hole to be, said Wielgus. In 2017 the EHT reached maturity with telescopes located at five distinct geographical sites across the globe. In 2009-2013 M87* was observed by early-EHT prototype arrays, with telescopes located at three geographical sites in 2009-2012, and four sites in 2013. – With the incredible angular resolution of the EHT we could observe a billiard game being played on the Moon and not lose track of the score!, said Maciek Wielgus, an astronomer at Center for Astrophysics | Harvard & Smithsonian, Black Hole Initiative Fellow, and lead author of the paper. Together they form a virtual Earth-sized radio dish, providing a uniquely high image resolution. The EHT is a global array of telescopes, performing synchronized observations using the technique of Very Long Baseline Interferometry (VLBI).
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THE BLACK HOLE SHORT FILM ANALYSIS FULL
The full results appeared in The Astrophysical Journal. The analysis reveals the behaviour of the black hole image across multiple years, indicating persistence of the crescent-like shadow feature, but also variation of its orientation-the crescent appears to be wobbling. The EHT team has now used the lessons learned last year to analyze the archival data sets from 2009-2013, some of them not published before. In 2019, the Event Horizon Telescope (EHT) Collaboration delivered the first image of a black hole, revealing M87*-the supermassive object in the center of the M87 galaxy.