Keplers Law

Front

Definition of Revolution

Back

Movement around something.

Front

Kepler's First Law

Back

Describes the shapes of the orbit; planets orbit the sun in ellipses.

Front

Kepler's Second Law

Back

Planets move faster when closer to the sun.

Front

How many planets are in our solar system?

Back

8 planets.

Front

Definition of Rotation

Back

Spinning around an axis.

Front

What is an ellipse?

Back

An elongated circle; the shape of planetary orbits.

Front

What does Kepler's Third Law state?

Back

The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

Front

What is the semi-major axis?

Back

The longest radius of an ellipse, half of the longest diameter.

Front

What is the significance of the sun in Kepler's Laws?

Back

The sun is at one of the foci of the elliptical orbits of planets.

Front

What is orbital speed?

Back

The speed at which a planet travels along its orbit.