Tell Me About Space


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Planet mercury

Mercury

First planet from the sun, with the shortest year of all planets in the Solar System (87.97 Earth days). Learn More.

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Planet Venus

Venus

Second planet from the sun. Has a thick, toxic atmosphere and spins in the opposite direction from other planets. Learn More.

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Planet Mars

Mars

Fourth planet from the sun. Second-smallest planet in the Solar System. Learn More.

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Planet Jupiter

Jupiter

Gas giant. Largest planet in the Solar System and has 75 moons. Learn More.

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Planet Saturn

Saturn

Sixth planet from the sun. A gas giant like Jupiter, known for its rings. Learn More.

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Planet Uranus

Uranus

Seventh planet from the sun. Orbits the sun almost sideways, causing seasons the last for over 20 Earth years. Learn More.

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Planet Neptune

Neptune

Eighth planet from the sun. Has supersonic winds. Was the first planet whose existence was predicted by math before it was found. Learn More.

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Planet Pluto

Pluto

Controversially re-classified as a dwarf planet. Covered in glaciers, mountains of water ice, dunes, and possibly volcanoes of water, methane, or ammonia. Learn More.

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Planet Nine

A Solar System object whose existence was proposed in 2016. Estimated to be ten times larger than Earth and orbits farther from the Sun than Pluto. Has not been visually observed, but there is evidence for its existence based on gravitational effects seen in the far reaches of the Solar System. Learn More.