Exoplanets
Exoplanets are planets that exist outside our solar system. The first discovery of a confirmed exoplanet was in 1992, but now astronomers know of more than 5,000 exoplanets.
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Solar system
Our solar system hosts a plethora of fascinating planets and other objects.
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Milky Way
Our home galaxy hosts hundreds of billions of stars orbited by countless worlds.
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Alien life
Only one planet we know of hosts life. But the hunt for extraterrestrial life is on.
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Exotic objects
The universe is filled with extreme objects, from black holes to pulsars and more.