Moon (Luna)
The Moon is the fifth-largest moon in the solar system and influences tides, Earth's axial stability, and the day-night cycle. It is the only extraterrestrial body that humans have set foot on.
astronomy.moons
Metrics
Diameter
Mean diameter.
Mass
Orbital Period
Sidereal orbital period around Earth.
Distance to Earth
Mean distance.
Relations
The Moon stabilizes Earth's axis and causes tides.
Explanations
The Moon is the fifth-largest moon in our solar system and orbits Earth every 27.3 days – that's its "year". With a diameter of 3,475 km, it's about one-quarter the size of Earth. What's amazing: the Moon doesn't just influence our ocean tides, but also stabilizes Earth's axial tilt, which means our climate is much more stable than on other planets – and humans have actually been there!
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Provenance
Status
seed
Review
none
Last Updated
2026-02-17