The Black Hole in the Center, Hundreds of researchers and many telescopes were required to capture an image of the black hole in the center of our Milky Way galaxy. 바카라사이트
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Astronomers have just released the first image of Sagittarius A*, the supermassive black hole at the center of the Milky Way.
Black holes are technically invisible. They capture all light that enters. As a result, photographing one is a bit of a paradox.
This is a photograph of the black hole’s shadow—a dark circular silhouette set against the glowing matter that surrounds it.
The image was captured by astronomers using the Event Horizon Telescope, a global network of radio observatories.
The EHT employs a technique known as Very Long Baseline Interferometry, or VLBI.
This essentially means that radio observatories from around the world will be combined
Into a single virtual Earth-sized telescope.
It is the highest resolution technique available in astronomy. Astronomers spent nights in April 2017
Pointing these telescopes at Sagittarius A* and other supermassive black holes in other galaxies. 카지노사이트
That is when they obtained the famous image of the black hole at the center of the galaxy M87, which they published in 2019.
M87 is 55 million light years away from us and has the mass of 6.5 billion suns.
That’s quite a lot
Sagittarius A, our black hole, is much smaller, but much closer. It is the size of Mercury’s orbit around the sun and is 26,000 light years away from Earth.
Sagittarius A is smaller than M87, so the shredded matter orbiting it moves much faster.
This means that the black hole’s appearance is constantly changing.
That’s also why it took years to extract a clear image of Sagittarius A* from the petabytes of data gathered during the 2017 observing run.
Consider it similar to photographing a dancer with a long exposure. Photographing a black hole is more difficult because it changes so quickly.
The astronomers claim that as more observatories are added to the EHT, they will be able to make movies of Sagittarius A* in the future. 카지노 블로그