Star systems and galaxies

Front

The name of our galaxy.

Back

Milky Way

Front

The name of the theory that states a HUGE explosion that produced matter, energy, and created the universe.

Back

Big Bang Theory

Front

The universe is constantly __________________ in size.

Back

expanding

Front

Brightness that is affected by distance.

Back

Apparent brightness

Front

Galaxy with a bulge in the middle and arms that spiral outward like a pinwheel.

Back

Spiral

Front

A galaxy made up of a mass of stars clumped together to look like a round or flattened sphere.

Back

Elliptical

Front

A galaxy formed when two other galaxies crash into each other. They are small with bright, young stars.

Back

Irregular

Front

The true brightness of a star

Back

Absolute brightness

Front

What size star is the sun?

Back

Average mass

Front

Which element is a star mostly made up of?

Back

Hydrogen