Kepler's Laws

Front

What is Kepler's 1st Law?

Back

Kepler's 1st Law states that the orbits of planets are elliptical, with the Sun at one of the foci.

Front

What does Kepler's 2nd Law describe?

Back

Kepler's 2nd Law states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time, meaning planets move faster when closer to the Sun.

Front

What is the force that causes planets to move in their orbits?

Back

Gravity is the force that causes planets to move in their orbits around the Sun.

Front

Which planet has the longest year?

Back

Mars takes the longest time to revolve around the Sun compared to Mercury, Venus, and Earth.

Front

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

Back

The path a planet travels around the Sun is called its orbit.

Front

What does a planet's eccentricity indicate?

Back

A planet's eccentricity indicates how much its orbit deviates from being circular; an eccentricity closer to zero means the orbit is more circular.

Front

What shape are the orbits of planets according to Kepler's Laws?

Back

The orbits of planets are elliptical.

Front

What is the significance of the foci in an elliptical orbit?

Back

In an elliptical orbit, the Sun is located at one of the two foci, affecting the distance between the planet and the Sun throughout its orbit.

Front

How does distance from the Sun affect a planet's speed?

Back

Planets move faster when they are closer to the Sun and slower when they are farther away, as described by Kepler's 2nd Law.

Front

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

Back

According to Kepler's 3rd Law, the square of a planet's orbital period is proportional to the cube of its average distance from the Sun.