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Name that nebula!
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A nebula is a cloud of dust and gas in space.
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How Did the Solar System Form?
The story starts about 4.6 billion years ago, with a cloud of stellar dust.
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Gallery of NASA Universe Images
Galaxies, nebulae, and supernova remnants to view or print.
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Find definitions of space and Earth science terms
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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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Printable posters, lithographs, postcards, and bookmarks.
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Learn more about what these groups of stars can (and can’t) tell us about our place in the universe.
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Glossary for "Sign Here!" words
Defines words in "Sign Here" game.
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Color Your Universe: Find the Hidden Objects
Can you find all the NASA and space-themed hidden objects?
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A light-year is the distance light travels in one Earth year. Learn about how we use light-years to measure the distance of objects in space.
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Learn more about these exploding stars!
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