The Universe Vocab (and other things)

Front

Collection of all things in space

Back

universe

Front

A system of millions or billions of stars, gas, and dust held by gravity.

Back

galaxy

Front

Electromagnetic radiation remnant from the early universe in Big Bang

Back

Cosmic Background radiation

Front

A giant cloud of dust and gas in space

Back

nebula

Front

A fixed luminous point in the night sky, a large, remote incandescent body.

Back

star

Front

A galaxy without a distinct shape

Back

Irregular galaxy

Front

Unit of astronomical distance that light travels in a year (9.4607 × 10^12 km).

Back

light year

Front

Theory that all matter and energy was compressed and exploded 13-15 billion years ago, expanding in all directions.

Back

Big Bang Theory

Front

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

Back

galaxy

Front

Distance light travels in a year.

Back

Light Year