
How many moons does the Earth have?
Daniel and Kelly’s Extraordinary Universe
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Is Pluto No Longer Considered Planet?
In early astronomy, a planet was just like another astronomical object. People didn't really understand the relationship between the planets and the stars. You can definitely have things that are not planets that have stuff orbiting them. The moon is actually considered a planet for a while, though the definition of planet has also changed. There are other things orbiting the earth that could also be considered moons.
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