How many planets did you say?

The estimate of extra-solar planets in our galaxy just got a bit more grounded. 50 billion is the number. With around 500 million of them thought to exist within their star’s habitable zone.

That is a pretty stunningly large number. And remember, the Millky Way is just an average-sized galaxy without any particularly remarkable features to make it special.

Makes you wonder, doesn’t it?

 

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