Galaxies (TEKS 8.9.B)

Front

What is a galaxy?

Back

A galaxy is a massive system that consists of stars, star clusters, dust, gas, and dark matter, all bound together by gravity.

Front

What is the Milky Way galaxy?

Back

The Milky Way is the galaxy that contains our solar system, characterized by its spiral shape and a central bulge of stars.

Front

Why can't we see the entire shape of the Milky Way from Earth?

Back

We cannot see the entire shape of the Milky Way because Earth is located within the galaxy, limiting our view.

Front

What is the order of size from smallest to largest: galaxy, solar system, space between galaxies?

Back

The correct order is: solar system → galaxy → space between galaxies.

Front

What is the center of the Milky Way galaxy composed of?

Back

The center of the Milky Way consists of a dense cluster of stars and possibly a supermassive black hole.

Front

What is dark matter?

Back

Dark matter is a type of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What are the two main types of galaxies?

Back

The two main types of galaxies are spiral galaxies and elliptical galaxies.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral arms that wind outward from the center.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an oval shape and lacks the distinct arms found in spiral galaxies.

Front

What is the significance of the Andromeda galaxy?

Back

The Andromeda galaxy is the nearest spiral galaxy to the Milky Way and is on a collision course with it.