It is said that this is a photo about Sagittarius A*.
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On April 1, the European Commission, the European Research Council, and the Event Horizon Telescope (EHT) announced that they will hold a joint press conference on April 10th. The world has demonstrated the major research results of the ground-breaking telescope.
It is understood that the press conference will be released simultaneously in Brussels, San Diego, Shanghai, Taipei, Tokyo, and Washington in four languages: English, Chinese, Spanish and Japanese, highlighting EHT's international cooperation spirit. This international cooperation project has also received funding support from the Academy of Sciences and the Ministry of Science and Technology. Participating in EHT research institutes, there are many research institutes of the Chinese Academy of Sciences and the Observatory, the National Science University, Huake University, Nanda University, Zhongda University, Peking University, China University of Science and Technology, and Taiwan University.
EHT has built a virtual telescope with a diameter equal to the diameter of the Earth for black hole detection through the collaboration of Very Long Baseline Interference Technology (VLBI) and multiple radio astronomy stations around the world. The industry generally believes that EHT has received the first black hole photo in human history and will be announced at the press conference on April 10. According to an informed source who disclosed the name, EHT released the observation data of Sagittarius A* (Sagittarius A*), which took more than two years. Sagittarius A* is a super-quality black hole in the center of our galaxy, which is surrounded by star dust and gas, compared to 4.02 ~ 4.3 million suns. As everyone knows, black holes engulf everything, including light. Therefore, the EHT will only publish an image of the "event horizon", the image at the edge of the black hole.
Regarding what this image looks like, this will be the first time that humans have seen the black hole after hearing the black hole gravitational wave a few years ago. It is another limit verification of Einstein's general theory of relativity.
Einstein's general theory of relativity predicts that black holes not only exist, but also "behind the scenes" of some extreme phenomena in the universe. Its body is small, its mass is very large, and it has a very strong gravitational force. In a certain area around it, even light cannot escape. This area is also known as the "event horizon." The "Event Vision Telescope" actually attempts to observe the "event horizon" of the black hole.
When the black hole swallows the surrounding material, it forms a rotating accretion disk. The radio waves generated by the friction of the substances can pass through the dust and reach the earth and be captured by the radio telescope. However, the resolution of a single radio telescope is too low, even if the diameter of up to 500 meters, the world's largest eye, is not enough. EHT therefore networked radio telescopes around the world to form an Event Vision Telescope (EHT) with a mirror diameter equivalent to the distance between the telescopes, reaching the entire Earth's diameter and increasing its resolution enough to capture black holes in the center of the Milky Way.
According to reports, the "Event Vision Telescope" has collected information on two super black holes, one is the "Sagittarius A*" in the center of the Milky Way, and the other is located in the center of the super-large elliptical galaxy code-named M87. Sarah Markov, a professor of astrophysics at the University of Amsterdam in the Netherlands, said that the photo taken by the "Event Vision Telescope" will be a true aerial view that will help us understand why black holes can have a profound impact on the celestial bodies in the universe.