Inrtoducing The Solar System Flashcards

0
Q

Astronomical Unit

A

A unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.

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1
Q

Solar system

A

The system consisting of the sun and the planets and other objects that revolve around it

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2
Q

Planet

A

Is round, orbits the sun, have cleared out the region of the solar system along its orbit. (This means it done not share the area of its orbit with any other objects)

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3
Q

Dwarf planet

A

Is an object that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit. (This means other objects also share its orbit)

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4
Q

Asteroids

A

Small, mostly rocky bodies, that orbit the sun.

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5
Q

Comets

A

Loose balls of ice and rock that usually have very long, narrow orbits.

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6
Q

Planetesimal

A

One of the small astroid-like bodies that formed the building blocks of the planets.

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