Front

What is a galaxy?

Back

A galaxy is a cluster of millions of stars held together by gravity.

Front

What is the scientific study of the universe?

Back

Astronomy is the scientific study of the universe.

Front

What is the first stage of solar system formation?

Back

The first stage of solar system formation is when a nebula collapses.

Front

What is the term for Earth spinning on its axis?

Back

Rotation is the term for Earth spinning on its axis.

Front

What is a cloud of gas and dust in space called?

Back

A cloud of gas and dust in space is called a nebula.

Front

What is the difference between rotation and revolution?

Back

Rotation refers to an object spinning on its axis, while revolution refers to an object orbiting around another object.

Front

What is the main component of a nebula?

Back

The main components of a nebula are gas and dust.

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 is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system.

Front

What is the significance of the nebular hypothesis?

Back

The nebular hypothesis explains how the solar system formed from a rotating cloud of gas and dust.