4-4 Kepler's Laws of Motion

Front

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once.

Back

longer

Front

Kepler's first law states that the orbits of the planets are oval in shape or _______.

Back

ellipses

Front

The place where a planet is farthest away from the Sun in its orbit around the Sun is called the _______.

Back

aphelion

Front

When a planet orbits the Sun, one of the foci of the elliptical orbit is _______.

Back

the Sun

Front

What is at the middle of a Heliocentric system?

Back

Sun

Front

Kepler's second law states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. This means that a planet moves _______ when it is closer to the Sun.

Back

faster

Front

The point in a planet's orbit where it is closest to the Sun is called the _______.

Back

perihelion

Front

Kepler's third law relates the time a planet takes to orbit the Sun to its distance from the Sun. It states that the square of the orbital period is proportional to the cube of the semi-major axis of its orbit. This can be expressed as _______.

Back

T^2 ∝ r^3

Front

In an elliptical orbit, the distance from the center of the ellipse to a focus is called the _______.

Back

focal distance

Front

The shape of a planet's orbit can be described by its _______.

Back

eccentricity