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Jan G
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Time lapse of the supermassive black hole at the center of the Milky Way

This video is a series of infrared images of the center of the Milky Way observed by the Keck telescopes on Mauna Kea in Hawaii. The images were taken over a time span of 3 hours. At the very center is a red flickering object, this is the supermassive black hole (named Sgr A*) at the center of our galaxy! The black hole has a mass of about 4 million suns. Black holes by themselves do not emit light, but at the center of the galaxy, there is a lot of gas. Some this gas is always falling onto the black hole. On its way into the black hole, this gas heats up and lights up. One hypothesis is that different amount of gas falls in at different times, causing the black hole to flicker like a candle!

http://www.galacticcenter.astro.ucla.edu/animations.html

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