What If Earth Was As Big As These Exoplanets? | Nasa Video

There are hundreds of billions of alien worlds in the Milky Way galaxy. And scientists have already discovered and confirmed over 5,000 of them. Small rocky worlds like Kepler-37 b are a pretty rare find. Because they're so tiny, they're more difficult to spot. But scientists have still managed to confirm about 200 of those worlds.

00:00 Exoplanets
01:37 KOI-55 b
02:26 GJ 1132 b
03:28 Kepler-452 b
08:09 HD 100546 b

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