ইভেন্ট হোরাইজন টেলিস্কোপ কী ? What is Event Horizon Telescope। Blackhole ।

Описание: The Event Horizon Telescope (EHT) is a large telescope array consisting of a global network of radio telescopes. The EHT project combines data from several very-long-baseline interferometry (VLBI) stations around Earth with angular resolution sufficient to observe objects the size of a supermassive black hole's event horizon. The project's observational targets include the two black holes with the largest angular diameter as observed from Earth: the black hole at the center of the supergiant elliptical galaxy Messier 87 (M87), and Sagittarius A* (Sgr A*) at the center of the Milky Way.[1][2][3]

The Event Horizon Telescope project is an international collaboration launched in 2009 [1] after a long period of theoretical and technical developments. On the theory side, work on the photon orbit [4] and first simulations of what a black hole would look like [5] progressed to predictions of VLBI imaging for the Galactic Center black hole, Sgr A*.[6] Technical advances in radio observing moved from the first detection of Sgr A*,[7] through VLBI at progressively shorter wavelengths, ultimately leading to detection of horizon scale structure in both Sgr A* and M87.[8] The collaboration now comprises over 200 members, 60 institutions, working over 20 countries and regions.[3]

The first image of a black hole, at the center of galaxy Messier 87, was published by the EHT Collaboration on April 10, 2019, in a series of six scientific publications.[9] The array made this observation at a wavelength of 1.3 mm and with a theoretical diffraction-limited resolution of 25 microarcseconds. Future plans involve improving the array's resolution by adding new telescopes and by taking shorter-wavelength observations