Solar System Flashcards

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0
Q

Astronomical unit (AU)

A

A unit of distance that equals the average distance between the Earth and the sun.

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1
Q

Solar system

A

The system consisting of the sun and planets and other objects such as asteroids, comets, and ice that revolve around it.

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2
Q

Planet

A

An object that orbits the sun that is big, enough to have become rounded by its own gravity, and has an orbit.

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3
Q

Dwarf planet

A

An smaller object than a planet that orbits the sun. It is spherical. But has not cleared the area of its orbit.

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4
Q

Asteroids

A

A rocky objects that revolves around the sun.

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5
Q

Comet

A

A collection a ice and dust that orbits the sun in a long narrow orbit.

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6
Q

Planetesimal

A

A small asteroid-like body that is formed by the building blocks of the planets.

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