SPACE EXPLORATION

Space exploration is a broad topic covering many facets of deep-space and planetary science. Learn about space probes, Mars Rovers, SETI and other out-of-this-world subjects.
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10 Remarkable Exoplanets

There's a lot more out there than our measly solar system, and astronomers are becoming more adept at finding those worlds all the time. Here are 10 of their coolest discoveries.

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