“When I look up at the sky, it looks a little bit friendlier because it’s like, maybe somebody is waving,” said study lead author Lisa Kaltenegger, director of the Carl Sagan Institute at Cornell University.Įven though some experts, including the late Stephen Hawking, warn against reaching out to aliens because they could harm us, Kaltenegger said it doesn’t matter. Astronomers took a technique used to look for life on other planets and flipped it around - so instead of looking to see what’s out there, they tried to see what places could see us.Īstronomers calculated that 1,715 stars in our galactic neighborhood - and hundreds of probable Earth-like planets circling those stars - have had an unobstructed view of Earth during human civilization, according to a study Wednesday in the journal Nature.
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