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What is an exoplanet? And how do we know they're out there?
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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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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 does it help us find new planets?
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Check out these nine unearthly nightmares that could be happening right now in our own galaxy. Eek!
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A transit is when one object in space crosses in front of another object in space. The Moon transits the Sun during an eclipse, but did you know that other objects can transit, too? Learn more in this article.
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A story about a girl's search for another Earth.
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What Is the James Webb Space Telescope?
The James Webb Space Telescope is the largest, most powerful space telescope ever built.