![]() It's so named because (per co-discoverer Robert Brown) the radio source was "exciting," and in physics, the excited states of atoms are denoted with an asterisk. Physicists have been convinced since the 1980s that the central component of Sagittarius A*-and the source of all those radio emissions-was likely a supermassive black hole, similar to those thought to be at the center of most spiral and elliptical galaxies. Astronomers have unveiled the first image of the supermassive black hole at the centre of our own Milky Way galaxy. Event Horizon Telescope Collaboration By Lisa Grossman and Emily Conover Apat 3:15 pm This is what a black hole looks like. That ring is a bright disk of gas orbiting the supermassive behemoth in the galaxy M87. It was named Sagittarius A* (pronounced A-star). The first image of a black hole shows a bright ring with a dark, central spot. Later research revealed that the source actually had several overlapping components, one of which (identified in 1974) was particularly bright and compact. The collaboration is currently in the process of selecting optimal places across the world, to increase the number of sites to approximately 20. Now, new telescopes at new sites are being built to better fill in the gaps of the broken mirror. In 1933, physicist Karl Jansky noticed a radio signal coming from somewhere in the constellation Sagittarius, near the center of our Milky Way galaxy, which he dubbed Sagittarius A. The 2019 first-ever image of a black hole was made by borrowing existing telescopes at six sites. Six papers about the research have been published in a special issue of The Astronomical Journal Letters. The collaboration made the announcement during a livestreamed press conference this morning from the European Southern Observatory's headquarters in Munich, Germany, as well as numerous other simultaneous press conferences around the world. ![]() Scientists with the international Event Horizon Telescope (EHT) collaboration have now produced the first image of that black hole, showing that it has a ring structure. ![]() Zoom in for our first look at the black hole at the center of our Milky Way, courtesy of the Event Horizon Telescope collaboration.Īt the heart of our Milky Way galaxy lurks a supermassive black hole more than four million times the mass of our Sun. ![]()
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