The Moon's surface is covered in craters.
Fact #97
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Solar eclipses occur when the Moon blocks the Sun from Earth's view.
Fact #189 · Space
In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
Fact #765 · Space
The Fermi Paradox questions why extraterrestrial life has not been observed.
Fact #1603 · Space
The Earth's atmosphere is layered into troposphere, stratosphere, and beyond.
Fact #277 · Space
Saturn's largest moon is Titan.
Fact #271 · Space
The Earth's gravity keeps the Moon in orbit.
Fact #283 · Space
Some pulsars emit beams of radiation like cosmic lighthouses.
Fact #1610 · Space
Project Blue Book investigated reports of unidentified flying objects.
Fact #1047 · Space
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