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Jill Tarter, a pioneer in “SETI,” the search for extraterrestrial intelligence, said in an e-mail: “We haven’t yet found Earth 2.0, but these statistics suggest that it should be forthcoming, and soon. When we can point to Earth 2.0 in the sky, it will seem completely natural to ask ‘Does anybody live there?’ and ‘Can we go there?’ I think Earth 2.0 will concretize SETI as nothing else has.”
reply to post by mitman93
Interesting article but you shouldn't make up your own title which is different from what the article says. It's referring to stars like our sun, and you're referring to stars we can see at night. We see other stars at night which are not like our sun, so one doesn't necessarily infer the other. About 7.6% of stars in the Milky Way are the same yellow type as our sun according to this:
Moreover, the yellow-white, white, and blue-white stars are seen in greater frequency than their proportion would suggest, because they are typically brighter, so even the 7.6% figure is misleading if you're talking about what "stars you can see at night".
So, one calculation inferred from the article would be that 22% of sun like stars have Earth like planets orbiting them, and since 7.6% of stars in the Milky Way are the same type as our sun, this is only 1.67% of stars in the Milky Way.