Ch. 30 Galaxies and the Universe

Front

What is a large grouping of stars, dust, and gas bound together by gravity?

Back

Galaxy

Front

Most galaxies seem to be organized into groups called?

Back

clusters

Front

The Milky Way Galaxy is most likely what type of galaxy?

Back

a barred spiral galaxy

Front

What does the Big Bang theory suggest about the universe?

Back

The universe is continually expanding.

Front

What was the name given to the first galaxy discovered outside of the Milky Way?

Back

Andromeda

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.

Front

What are the two main types of galaxies?

Back

Elliptical and spiral galaxies.

Front

What is the difference between a solar system and a galaxy?

Back

A solar system consists of a star and its planets, while a galaxy is a vast collection of stars, gas, and dust.

Front

What is the significance of the Hubble Space Telescope in astronomy?

Back

It has provided deep space images that have expanded our understanding of the universe.

Front

What is dark matter?

Back

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