On March 8, 1979, NASA’s Voyager 1 spacecraft discovered active volcanoes on Jupiter’s moon Io. See how it happened in our On This Day in Space video series.
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- See the Whirlpool Galaxy Through the Eyes of the NASA’s ‘Great Observatories’
- This Is the Purest Beam of Light in the World
- Hyperfast Shock Waves from a Supernova Heat Atoms to Blazing-Hot Temperatures