Scientists believe there are potentially many more Earth-like planets in the universe -- and some of them could be home to alien life.
"Astronomers think it is very likely that every single star in our Milky Way galaxy has at least one planet," Sara Seager, professor of planetary science and physics at Massachusetts Institute of Technology, said during the talk. "Sometime in the near future, people will be able to point to a star and say, 'that star has a planet like Earth.'"
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