Orbital Motion Test Review

Front

What is orbital motion?

Back

Orbital motion refers to the movement of an object in an orbit around a central point, such as a planet orbiting a star due to gravitational forces.

Front

What is Kepler's 3rd Law?

Back

Kepler's 3rd Law states that the square of the orbital period (T) of a planet is directly proportional to the cube of the semi-major axis (a) of its orbit: T² ∝ a³.

Front

What does eccentricity measure in an orbit?

Back

Eccentricity measures the deviation of an orbit from being circular. It ranges from 0 (perfectly circular) to 1 (parabolic).

Front

What is the eccentricity of a circular orbit?

Back

The eccentricity of a circular orbit is 0.

Front

How does distance from the sun affect a planet's orbital period?

Back

According to Kepler's 3rd Law, the further a planet is from the sun, the longer its orbital period.

Front

What is the formula for calculating eccentricity (e)?

Back

Eccentricity (e) = (distance between foci) / (length of major axis).

Front

Which planet has the highest eccentricity in the solar system?

Back

Mercury has the highest eccentricity among the planets in the solar system.

Front

What is the semi-major axis?

Back

The semi-major axis is half of the longest diameter of an ellipse, representing the average distance from the center of the ellipse to its edge.

Front

What is the significance of a planet's orbital speed?

Back

A planet's orbital speed varies depending on its distance from the sun; it moves faster when closer and slower when farther away.

Front

What is an ellipse?

Back

An ellipse is a geometric shape that resembles a flattened circle, defined by two focal points.