Solar System Vocab.

The path an object takes as it revolves around another object in space

• gravity

• axis

• orbit

An instrument that measures the time of day using the sun

• sundial

• compass

• wind turbine

holes or dents on the surface of a planet or moon made by the impact of another object

• craters

• valleys

• orbits

A natural satellite that orbits a planet

• sun

• moon

• space station

The star at the center of our Solar System

• Mercury

• Sun

• the North Star

The third planet from the sun

• Mercury

• Earth

• Mars

Force that pulls objects to the center of the Earth

• Galaxy

• Gravity

• Atmosphere

To spin or turn on an axis

• revolve

• rotate

• repeat

To go around

• rotate

• revolve

The imaginary line that goes through the center of the Earth

• axis

• equator

• point of spin