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Newly redesigned! Galactic census takers needed — no experience or door-knocking required. Easily use real astronomical data to uncover secrets of the universe, hidden in the HDF image.
Follow our sweeping history of the telescope from Galileo's first look at the stars to the work of modern observatories.
Discover the fierce force of gravity and pelt poor Jupiter
with a comet!
NASA needs your help in planning a Hubble Servicing Mission.
Join the team! (Replaces "Astronaut Challenge.")
Statistically speaking, this cosmic photo shoot is out of
Whip up a batch of comets without trashing the kitchen!
Great balls of fire … er, ice! Explore comet facts
and fantasies through the ages.
Galaxy construction timeline: billions of years. For you:
Take the plunge! Fall into one of our universes eeriest
UPDATED to reflect current science!
Keep the planets in your pocket. A fun card game tours our cosmic neighborhood.
Catch the (light) wave! Find out how color can be more than
meets the eye.
are a fun, interactive way to explore galaxies,
black holes, comets, and other fascinating objects.