Science

Match it! Select the correct answer from the pull down...Good luck!

________collect and focus light and other forms of electromagnetic radiation.

The ___________includes radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Astronomers use it to describe sizes and distances in the universe, when numbers are too long or too short:

Astronomers often use ___________ to measure distances to nearby stars.

Scientist use _________ to classify stars.

Characteristics used to classify stars include:

According to this theory, the Universe formed in an instant, billions of years ago, in an enormous explosion.

They use a unit called the _____________ to measure distances between stars.