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The Event Horizon Telescope (EHT) is a 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, which form a combined array with an angular resolution sufficient to observe objects the size of a supermassive black hole's event horizon.
In astrophysics, an event horizon is a boundary beyond which events cannot affect an outside observer. Wolfgang Rindler coined the term in the 1950s. [1]In 1784, John Michell proposed that gravity can be strong enough in the vicinity of massive compact objects that even light cannot escape. [2]
The Event Horizon Telescope (EHT) is an active program that directly observes the immediate environment of black holes' event horizons, such as the black hole at the centre of the Milky Way. In April 2017, EHT began observing the black hole at the centre of Messier 87.
On 24 March 2021, the Event Horizon Telescope collaboration revealed an unprecedented unique view of the M87 black hole shadow: how it looks in polarized light. [91] Polarization is a powerful tool which allows astronomers to probe physics behind the image in more detail.
This flickering appears to be emanating from material very close to the event horizon, the point of no return beyond which everything - stars, planets, gas, dust and all forms of electromagnetic ...
The James Webb Space Telescope has shown that the Milky Way’s black ... edge of the accretion disk just beyond the black hole’s event horizon, ... reconnection event is like a spark of static ...
It was the first radio telescope to resolve Pluto and Charon as separate objects. [9] The SMA is a part of the Event Horizon Telescope, which observes nearby supermassive black holes with an angular resolution comparable to the size of the object's event horizon and which produced the first image of a black hole.
In May 2022, astronomers released the first image of the accretion disk around the horizon of Sagittarius A*, confirming it to be a black hole, using the Event Horizon Telescope, a world-wide network of radio observatories. [13] This is the second confirmed image of a black hole, after Messier 87's supermassive black hole in 2019.