Front

The star at the center of the solar system that supplies heat and light to Earth; its enormous gravity keeps the solar system in orbit.

Back

The Sun

Front

The planet on which all known life exists

Back

Earth

Front

A natural satellite that orbits a planet; some planets have none others have over 60 of these

Back

The Moon

Front

An imaginary line that a sphere rotates around. It passes through Earth's center and its poles.

Back

Axis

Front

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

Back

Orbit

Front

The northernmost point on Earth, as determined by the planet’s rotation.

Back

North Pole

Front

to spin on an axis

Back

Rotation

Front

The southernmost point on Earth, as determined by the planet’s rotation.

Back

South Pole

Front

to travel in a closed path

Back

revolve

Front

An imaginary line around Earth equally distant from the North and South Poles.

Back

equator