Chapter 1: The Universe

Front

Universe

Back

Everything that exists including all matter, energy, space, and time.

Front

Normal Matter

Back

Visible matter in the universe, 5% of the universe.

Front

Dark Matter

Back

Invisible matter, 25% of the universe.

Front

Dark Energy

Back

Unknown force causing universe expansion, 70% of the universe.

Front

Infrared Light

Back

Invisible light waves, longer wavelength than red, detects heat.

Front

Visible Light

Back

Light waves visible to the human eye, colors of the rainbow.

Front

Ultraviolet Light

Back

Invisible light waves, more energy than visible light, causes sunburn.

Front

Gamma Rays

Back

Highest energy light waves in the electromagnetic spectrum.

Front

Cosmic Microwave Background

Back

Oldest observable thing in the universe, edge of the observable universe.

Front

Light Year

Back

Distance light travels in one Earth year.