The Apollo 11 mission successfully landed humans on the Moon.
Fact #1017
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The light you see from some stars today began traveling before humans existed.
Fact #1959 · Space
The Bell Labs experiment led to the discovery of the cosmic microwave background.
Fact #1021 · Space
Mercury is the closest planet to the Sun.
Fact #35 · Space
The Earth's atmosphere gradually fades into space.
Fact #334 · Space
Supernovae can briefly outshine entire galaxies.
Fact #1617 · Space
Venus has surface temperatures hot enough to melt lead.
Fact #215 · Space
The Moon always shows the same face to Earth.
Fact #134 · Space
The universe is estimated to be about 13.8 billion years old.
Fact #1623 · Space
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