Universe Vocabulary 01.01-01.02

Front

A unit of astronomical distance equivalent to the distance that light travels in one year, which is approximately 5.88 trillion miles (9.46 trillion kilometers).

Back

Light year

Front

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Back

Scientific notation

Front

Any natural object existing outside Earth's atmosphere. These include planets, stars, moons, asteroids, comets, and galaxies.

Back

Celestial

Front

A celestial body large enough to have its own gravitational pull.

Back

Planet

Front

A collection of planets orbiting the same star.

Back

Planetary system

Front

The transfer of energy through waves.

Back

Radiation

Front

A scale that has two extremes (like a number line).

Back

Spectrum

Front

To produce and discharge something, especially a gas or radiation.

Back

Emit

Front

The distance between waves.

Back

Wavelength

Front

The number of waves that pass a given point in a certain amount of time.

Back

Frequency