martereja2de4rmeeeee martereja2de4rmeeeee

17-01-2017
Geography

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How many planets are there in the galaxy?

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litunchie litunchie

17-01-2017

There are about 200 billion stars in our galaxy, with 40 billion of them like our sun, Marcy said. One of his co-authors put the number of sun-like stars closer to 50 billion, meaning there would be at least 11 billion planets like ours

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