solar system library

Learn about Solar System and get information on topics related to Solar System.

Featured Article: Comet

Comet, KOM iht, is an icy body that releases gas or dust. See more »

Asteroid

Asteroid is a rocky or metallic object smaller than a planet that orbits the sun.

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Blue moon

Blue moon is a folklore term that has many definitions.

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Callisto

Callisto, kuh LIHS toh, is a large moon of Jupiter.

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Comet

Comet, KOM iht, is an icy body that releases gas or dust.

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Eclipse

Eclipse is the darkening of a heavenly body.

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Equinox

Equinox, EE kwuh noks, is either of the two days of the year when the sun is directly above the earth's equator.

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Evening star

Evening star is any planet that can be seen after sunset.

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Fireball

Fireball is a meteor that burns brightly as it plunges through the earth's atmosphere.

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Leonids

Leonids, LEE uh nihds, are meteors that seem to come from the constellation Leo.

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Mercury

Mercury is the planet nearest the sun.

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Meteor

Meteor is a bright streak of light that appears briefly in the sky.

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Moon

Moon is Earth's only natural satellite and the only astronomical body other than Earth ever visited by human beings.

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Planet

Planet is a large, round heavenly body that orbits a star and shines with light reflected from the star.

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Saturn

Saturn is the second largest planet in our solar system.

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Sun

Sun is a huge, glowing ball at the center of our solar system.

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Triton

Triton is the largest moon of Neptune.

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Venus

Venus is known as the Earth's "twin" because the two planets are so similar in size.

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