Galaxies and Gravity Review

Front

What is gravity?

Back

Gravity is a force that attracts all objects with mass towards one another.

Front

How many stars are typically found in a galaxy?

Back

Millions or billions.

Front

What is an astronomical unit?

Back

An astronomical unit is the average distance between the Earth and the Sun.

Front

Which property of an object never changes regardless of location in the universe?

Back

Mass.

Front

What type of galaxy is the Milky Way?

Back

The Milky Way is a spiral galaxy.

Front

What is the difference between weight and mass?

Back

Weight is the force of gravity on an object, while mass is the amount of matter in an object.

Front

What is the role of gravity in the formation of galaxies?

Back

Gravity pulls together gas and dust to form stars and galaxies.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.

Front

How does gravity affect the motion of planets?

Back

Gravity keeps planets in orbit around stars.

Front

What is the significance of the Hubble Space Telescope in studying galaxies?

Back

The Hubble Space Telescope has provided detailed images and data about distant galaxies.