Astronomy Concepts and Models

Front

What process produces energy within a star's core?

Back

Nuclear fusion.

Front

What is the geocentric model of our solar system?

Back

The Earth is located at the center of the model.

Front

What is the term for the spinning of Earth on its axis?

Back

Rotation.

Front

What contains Earth, the Sun, and billions of stars?

Back

The Milky Way galaxy.

Front

What describes the pattern of water-level variation shown by a tide gauge?

Back

Cyclic and predictable.

Front

What is the term for the movement of Earth around the Sun?

Back

Revolution.

Front

What is the main component of a star's core that allows nuclear fusion to occur?

Back

Hydrogen.

Front

What is the term for the apparent path of the Sun across the sky?

Back

Ecliptic.

Front

What is the name of the force that keeps planets in orbit around the Sun?

Back

Gravity.

Front

What is the term for the distance light travels in one year?

Back

Light-year.