Solar System Flashcards
(7 cards)
Astronomical unit
A unit of distance equal to the average distance between earth and the sun about 150 million kilometers.
Solar system
The system consisting of the sun and the planets and other objects that revolve around it
Planet
an object that orbits a star is large enough to have become rounded by its own gravity and has cleared the area of its orbits.
Dwarf planet
An object that orbits the sun and is spherical but has not cleared the area of its orbit
Asteroids
One of the rocky revolving object revolving around the sun that are too small and numerous to be considered planets
Comet
A loose collection of ice and dust that orbits the sun typically in a long narrow oribit
Planetesimal
One of the small asteroid-like bodies that formed the building blocks of the planets.
