The Universe Vocab Review

Front

Heat leftover from the Big Bang observable in the microwave spectrum.

Back

Cosmic Microwave Background Radiation

Front

Theory that 13-15 billion years ago, all matter and energy was compressed into a small volume that exploded and expanded.

Back

Big Bang Theory

Front

Displacement of the visible electromagnetic spectrum towards red due to motion away from an object.

Back

Redshift

Front

Scatter plot showing the relationship between a star's temperature and luminosity.

Back

Hertzsprung-Russell Diagram

Front

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

Back

Galaxy

Front

Star with a hot, dense core fusing hydrogen into helium for energy.

Back

Main Sequence

Front

Stellar core left after a star exhausts nuclear fuel and forms a planetary nebula.

Back

White Dwarf

Front

An object so massive and dense that light cannot escape its gravity.

Back

Black Hole

Front

Formed when a massive star collapses, crushing protons and electrons into neutrons.

Back

Neutron Star

Front

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

Back

Nebula