Solar System Flashcard

Front

What shape do planets orbit the Sun in?

Back

Ellipse

Front

In the heliocentric theory, what revolves around the Sun?

Back

Planets

Front

What is the relationship between a planet's speed and its distance from the Sun?

Back

A planet moves slower when it is farthest from the Sun.

Front

Where does a planet move faster in its orbit?

Back

From Position A to B.

Front

What happens to a planet's speed as the mass of the star it orbits increases?

Back

As star mass increases, speed increases.

Front

What is the term for the path of a planet around the Sun?

Back

Orbit

Front

What is the center point of an ellipse called?

Back

Focus

Front

What is the term for the closest point in a planet's orbit to the Sun?

Back

Perihelion

Front

What is the term for the farthest point in a planet's orbit from the Sun?

Back

Aphelion

Front

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

Back

Gravity