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Looking for another Earth? Here are 300 million, maybe
There are billions of exoplanets in the Milky Way galaxy, but how many of those are potentially habitable?
NASA: Hubble photographed an entire galaxy – See what Seifert NGC 3254 looks like
NGC 3254 was first spotted in March 1785 by astronomer William Herschel, about 118 million light-years from Earth