The known universe is made up of 50,000,000,000 galaxies. There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy. In the Milky Way alone there might be as many 100,000,000 planets. Are we really the only planet that sustains life...?
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brittneys4fcfcbdc0 commented on What Is Your Favorite Science Fact Of All Time?
10/8/2015
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