Solar System Flashcards
0
Q
Astronomical unit (AU)
A
A unit of distance that equals the average distance between the Earth and the sun.
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.
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.
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.
4
Q
Asteroids
A
A rocky objects that revolves around the sun.
5
Q
Comet
A
A collection a ice and dust that orbits the sun in a long narrow orbit.
6
Q
Planetesimal
A
A small asteroid-like body that is formed by the building blocks of the planets.
