EVERYDAY SCIENCE

Detailed explanation-1: -As you know that the earth has two types of motions, namely rotation and revolution. Rotation is the movement of the earth on its axis. The movement of the earth around the sun in a fixed path or orbit is called Revolution.

Detailed explanation-2: -The planets rotate and revolve in circular orbits around the sun and the motion repeats after a fix time period so the motion of planets is rotatory, circular and periodic.

Detailed explanation-3: -The two planetary movements are revolution and rotation. Planets revolve around a fixed entity. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune revolve around the sun.

Detailed explanation-4: -The relative motion of Mars, for instance, may be correctly represented by supposing that it has two motions, one its own motion, and superposed on this another, equal in magnitude to that of the earth’s motion about the sun, but in the opposite direction.