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
1
Q
Solar system
A
The system consisting of the sun and the planets and other objects that revolve around it.
2
Q
Planet
A
A planet is an object in space that is round, orbits the sun, and has cleared out the region of the solar system along its orbit
3
Q
Dwarf planet
A
An object in space that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit
4
Q
Asteroids
A
Small, rocky bodies in space
5
Q
Comets
A
Loose balls of ice and rock that usually have very long, narrow orbits
6
Q
Planetesimal
A
One of the small asteroid-like bodies that formed the building blocks of the planets
