Io's volcanoes erupt sulfur compounds, giving the moon a mottled yellow, orange, and red surface.
Fact #4598
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Neutron stars can spin hundreds of times per second.
Fact #1597 · Space
Saturn's rings are made primarily of ice particles and rocky debris.
Fact #17 · Space
The Sun occasionally emits powerful solar flares.
Fact #1620 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1827 · Space
There are rogue planets drifting through space with no star at all.
Fact #1871 · Space
Saturn's largest moon is Titan.
Fact #271 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1865 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1735 · Space
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