The Mars Pathfinder mission tested new landing techniques.
Fact #1016
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
Fact #1021 · Space
Saturn's rings are made primarily of ice particles and rocky debris.
Fact #17 · Space
The Moon's surface is covered in craters.
Fact #97 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1865 · Space
The Fermi Paradox questions why extraterrestrial life has not been observed.
Fact #1603 · Space
The Moon has no atmosphere like Earth's.
Fact #89 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1750 · Space
Mercury has no substantial atmosphere to trap heat.
Fact #249 · Space
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