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Chapter 3 Science

Lesson 2 Introducing the Solar System

solar system the system consisting of the sun and the planets and other objects that revolve around it.
astronomical unit a unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.
planet an object that orbits a star, is large enough to have become rounded by its own gravity and has cleared the area or its orbit
dwarf planet an object that orbits the sun and is spherical but has not cleared the area of its orbit
planetesimal one of the small asteroid-like bodies that formed the building blocks of the planets
Created by: dguilliams