Front

What is the formula for calculating gravitational force between two masses?

Back

F = G * (m1 * m2) / r^2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between their centers.

Front

What shape do planets orbit the Sun in?

Back

Ellipse.

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of an object around its own axis, while revolution is the movement of an object around another object.

Front

What is the period of the Earth's orbit around the Sun?

Back

1 year.

Front

What are the two points called around which an ellipse is drawn?

Back

Foci.

Front

What is Kepler's First Law of Planetary Motion?

Back

Planets move in elliptical orbits with the Sun at one focus.

Front

What is Kepler's Second Law of Planetary Motion?

Back

A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

Front

What is Kepler's Third Law of Planetary Motion?

Back

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

Front

What is the gravitational constant (G)?

Back

G = 6.674 × 10^-11 N(m/kg)^2.

Front

What is perihelion?

Back

The point in the orbit of a planet where it is closest to the Sun.