What is the belief of having or representing the earth as the center, as in former astronomical systems.

What is the region of interplanetary space between the orbits of Mars and Jupiter in which most asteroids are found.

What are the three laws devised by Johannes Kepler to define the mechanics of planetary motion.

Which scientist developed the laws of planetary motion?

A deviation of a curve or orbit from circularity is called:

A plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant.

The path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus.

An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time.

The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun.

The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.

The point in the orbit of a planet, asteroid, or comet at which it is Farthest from the sun.

The shortest diameter of an ellipse.

The Longest diameter of an ellipse.

The effect whereby the position or direction of an object appears to differ when viewed from different positions

The apparent shift of position of any nearby star (or other object) against the background of distant objects.

A unit based on the distance between the Earth and the sun.

1 Astronomical unit is equal to:

____________ is the gravitationally curved trajectory of an object.

The two points inside an ellipse that are used in its formal definition are the: