Unit 3 Lesson 1 Vocabulary

Front

Solar

Back

Having to do with the Sun.

Front

Lunar

Back

Having to do with the Moon.

Front

Heliocentric

Back

A model of the solar system where the Sun is in the center.

Front

Geocentric

Back

A model of the solar system where the Earth is in the center.

Front

Planets / Planetary

Back

Large objects that orbit a star, like Earth around the Sun.

Front

Orbit / Revolution

Back

The path an object takes as it goes around another object.

Front

Rotation

Back

When a planet or moon spins around on its axis.

Front

Universe

Back

Everything that exists: all space, stars, planets, and galaxies.

Front

Aristotle

Back

An ancient Greek thinker who believed Earth was the center of the universe.

Front

Ptolemy

Back

A Greek scientist who supported the idea of Earth being the center of the universe.