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Earth·Our home world. A vibrant planet with oceans, life, and a protective atmosphere.
Tonight's Sky
San Francisco, California
Visible Now: Venus (Very Bright) · Jupiter (Very Bright) · Mars (Bright) · Moon (Waning Gibbous)
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Weight on Other Planets
See how much you would weigh on each planet and moon.
Age Across the Solar System
Find out how old you would be on different worlds.
Compare Planet Sizes
Visualize and compare the sizes of planets and moons.
ISS Tracker
Follow the International Space Station and predict passes over your city.
Latest Educational Articles
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Star FormationHow Stars Are Born in Giant Clouds
A look inside stellar nurseries and the birth of new stars.
5 min read
MoonsEuropa's Hidden Ocean: What We Know
Exploring the evidence for a vast ocean beneath the ice.
6 min read
ObservingHow to See the Planets This Month
Tips for spotting bright planets with the naked eye.
4 min read
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