10 Departament dAstronomia i Astrofísica, Universitat de València, C. 4, Roosevelt Rd., Taipei 10617, Taiwan, R.O.C. "But that's also kind of uplifting in a certain way, too. The Astrophysical Journal Letters, Volume 930, Number 2 Citation Event Horizon Telescope Collaboration et al 2022 ApJL 930 L12 DOI 10.3847/2041-8213/ac6674. "There are big things out there and we are small," Doeleman said. Netherlands-based radio astronomer Huib Jan van Langevelde is the current EHT project director.ĭoeleman emphasized the size scale of supermassive black holes. Thursday's announcement will be made in simultaneous news conferences in the United States, Germany, China, Mexico, Chile, Japan and Taiwan. In disclosing the photo of that black hole, the researchers said that their work showed that Albert Einstein, the famed theoretical physicist, had correctly predicted that the shape of the shadow would be almost a perfect circle. The M87 black hole is far more distant and massive than Sagittarius A*, situated about 54 million light-years from Earth with a mass 6.5 billion times that of our sun. The galaxy contains at least 100 billion stars. Known as a spiral galaxy, the Milky Way viewed from above or below resembles a spinning pinwheel, with our sun situated on one of the spiral arms and Sagittarius A* located at the center. This is known as the black hole's shadow or silhouette. The project scientists have looked for a ring of light - super-heated disrupted matter and radiation circling at tremendous speed at the edge of the event horizon - around a region of darkness representing the actual black hole. The fact that black holes do not permit light to escape makes viewing them quite challenging. Such observations could lead to images of strong gravity effects that are expected near a black hole, and to the direct detection of dynamics near the black hole as matter orbits. A black hole's event horizon is the point of no return beyond which anything - stars, planets, gas, dust and all forms of electromagnetic radiation - gets dragged into oblivion. A long standing goal in astrophysics is to directly observe the immediate environment of a black hole with angular resolution comparable to the event horizon. The EHT project was begun in 2012 to try to directly observe the immediate environment of a black hole.
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