Universe

Front

Space and all the matter and energy in it.

Back

Universe

Front

The sun and all of the planets and other bodies that travel around it.

Back

Solar System

Front

A relatively large spherical body that orbits a star.

Back

Planet

Front

A large celestial body that is composed of gas and that emits light.

Back

star

Front

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

Back

Galaxy 

Front

A large cloud of gas and dust in interstellar space; a region in Space where stars are born.

Back

Nebula

Front

The distance that light travels in one year; about 9.46 trillion kilometers.

Back

Light Year

Front

The actual brightness of an object such as a star

Back

Luminosity

Front

A small, hot, dim star that is the leftover center of an old sunlike star

Back

White Dwarf

Front

A gigantic explosion in which a massive star collapses and throws its outer layers into space.

Back

Supernova