UNIT 1: EpitU Vocab

Front

A collection of stars, dust, and gas bound by gravity.

Back

Galaxy

Front

All of space and everything in it, including stars, planets, galaxies, etc.

Back

Universe

Front

Average distance from Earth to Sun (150M km, 93M miles)

Back

Astronomical Unit

Front

Force of attraction between objects due to their masses.

Back

Gravity

Front

Distance light travels in a year (9.5 trillion km or 5.9 trillion miles).

Back

Light year

Front

Group of celestial bodies orbiting a star.

Back

Solar System

Front

Movement of one object around another

Back

Revolution

Front

A large, round object in space that orbits a star.

Back

Planet

Front

An event where one celestial body's shadow falls on another.

Back

Eclipse

Front

A ball-shaped gaseous celestial body that shines by its own light.

Back

Star