Galaxies

Front

What is a galaxy?

Back

A huge system of millions or billions of stars, together with gas and dust, held together by gravity.

Front

What type of galaxy does not form a distinct shape or pattern?

Back

Irregular galaxy.

Front

What type of galaxy is the Milky Way?

Back

Spiral galaxy.

Front

What are the main components of a galaxy?

Back

Stars, gas, dust, and dark matter.

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

Spiral galaxies have a flat, rotating disk with stars, gas, and dust, while elliptical galaxies are more 3D and have a smooth, featureless light profile.

Front

What is an example of an irregular galaxy?

Back

The Large Magellanic Cloud.

Front

What is the significance of dark matter in galaxies?

Back

Dark matter makes up a significant portion of a galaxy's mass and affects its gravitational pull.

Front

How do galaxies form?

Back

Galaxies form from the gravitational collapse of gas and dark matter in the early universe.

Front

What is the role of gravity in the structure of a galaxy?

Back

Gravity holds the stars, gas, and dust together in a galaxy and governs its overall structure.

Tags

NGSS.HS-PS2-4

Front

What is a barred spiral galaxy?

Back

A type of spiral galaxy that has a central bar-shaped structure composed of stars.

Tags

NGSS.MS-ESS1-2