In the solar system most of the rotational and orbital motions are in the eastward direction. This is referred to as direct motion. Those in the opposite direction are called retrograde. There are three types of retrograde motion in astronomy. Planets, as scientists have noted move relative to the stars, moving from west to east […]
Tidal force is a secondary effect of gravitational force and its most common manifestation, at least on the planet Earth, are tides. Tidal force, by technical definition is the differential force of gravity which arises because the force exerted on one body by another is not constant across the diameter in that the side which
Anything we throw up in the air will fall back to the ground. This is because of the downward pull of gravity, which is causes the downward acceleration of 9.81 meters per second squared. For an object to leave the surface of the earth, without falling back due to gravity, it must possess a speed
People are very conscious of their weight. When they see that they exceed the normal weight they should have, they worry and go on a diet and perform regular exercise. But if they go to the moon or where there is no gravity pulling them down, they become weightless. The earth has a gravitational force
Photo by: Mbz1 Creative Commons Tides are the periodic fluctuations of large bodies of water. They are caused by the gravitational interaction between the Earth and the Moon in what is generally called tidal forces. Although tidal changes may occur as a result of other factors like the Moon’s altitude and distance, the positions of
