Sagittarius A* is the supermassive black hole at the center of our home Milky Way galaxy. It has a mass equal ... This video shows the 2.1 micron data taken on April 7, 2024.
In 1610, astronomer Galileo Galilei used the newly invented telescope to show that the Milky Way was composed of a huge number of faint stars. For the next 300 years, astronomers assumed that the ...
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