The Bell Labs experiment led to the discovery of the cosmic microwave background.
Fact #1021
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The Milky Way and Andromeda galaxies are on a slow collision course.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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Neptune appears blue because of methane in its atmosphere.
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The Moon has lower gravity than Earth.
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The International Space Station is one of the most complex engineering projects ever built.
Fact #1510 · Space
A day on Mars is slightly longer than a day on Earth.
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The observable universe spans billions of light-years.
Fact #1611 · Space
The International Space Station orbits Earth roughly every 90 minutes.
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