How many stars in the Milky Way have rocky planets?
It's estimated that each galaxy holds 200 billion stars, we've discovered about 344 planets in orbit around 295 stars in the Milky Way. Working from that ratio, it's estimated there are around 200-300 billion planets in our galaxy.
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About Galaxy
A galaxy is a group of billions and billions of stars clumped together by gravity. If our planet was a house, the solar system our town, our galaxy the Milky Way, would be our country.
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