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Searching for Other Planets Like Ours
Exoplanets are far away and hard to see. How do we look for them?
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And how round are they?
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Learn more about the planets in our solar system
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And how does it help us find new planets?
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We can use a planet’s gravitational pull like a scale!
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Astronomers may have found a planet without a sun!
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How Many Solar Systems Are in Our Galaxy?
Astronomers have discovered 2,500 so far, but there are likely to be many more!
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What is an exoplanet? And how do we know they're out there?
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Pluto is now categorized as a dwarf planet.
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How Long Is One Day on Other Planets?
Learn to make a graph with the answer!
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How Many Moons Does Each Planet Have?
We have one, but some planets have dozens.
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The coldest planet in our solar system