Two galaxies in the early universe, which contain extremely productive star factories, have been studied by a team of scientists led by Chalmers University of Technology in Sweden...
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The center of our Milky Way galaxy lies ~27,000 light-years away in the direction of the constellation of Sagittarius. At its core is a black hole ~4 million solar masses in size. Around the black hole is a donut-shaped structure about 8 light-years across that rings the inner volume of neutral gas and thousands of individual stars. Around that, stretching out to ~700 light-years, is a dense zone of activity called the Central Molecular Zone (CMZ)...
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