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Tidal Forces The force of gravity caused by an object gets weaker as you move farther away from that object. In this picture, the Earth is pulling on the Moon, and the Moon is pulling on the Earth. This is an optical illusion. Prove it for yourself here! The Moon does not make its own light. All moonlight is reflected sunlight. The bright part of the Moon is experiencing daytime. The Moon is a natural satellite , or a space object that orbits around something else.
In general, a moon is a natural satellite of a planet, and a planet is a special kind of natural satellite that orbits a star and also meets other conditions. Learn more: What makes a planet a planet? The leading theory is that a Mars-sized object collided with Earth billions of years ago, and debris from this collision eventually formed the Moon. Here is an animation that shows what this might have looked like:. Animation showing the Moon's early history. For more information, visit The Moon In Depth web page.
The Moon does have gravity. Earth would be a very different world if it had no Moon. Some of your frequently asked Moon questions, answered. Does the Moon spin on its axis? Why does the Moon rise and set? They are precisely equal. Oddly, Venus rotates from east to west, the opposite direction from most other planets and moons. This type of rotation is called retrograde rotation, from the Latin words for "moving backward". It's backwards. Venus rotates the opposite direction from most other moons and planets.
The moon's period of rotation on its axis and revolution in its orbit around the earth are both Synchronous rotation or tidal locking. The Moon is in synchronous rotation about the Earth.
Most major moons in the solar system have a synchronous rotation. The satellite Triton is on the planet Neptune. It is the largest of Neptune's moons. Neptune has 13 moons. It orbits in the opposite direction if its planet's rotation. It rotates, slowly, the 'wrong' way. Important or not, the moons happen to be there Anyway, effects caused by moons include reflecting light from the Sun making the night less dark when they are visible , tides, and - related to the tides - the gradual slowing-down of the planet's rotation.
Most moons orbit their planet the same way the planet rotates. One of Neptune's moons is very different. That moon goes in the opposite direction of Neptune's rotation.
Log in. Earth Sciences. See Answer. Best Answer. The rotation of the moon, or the time it takes to rotate on it's axis exactly once, is That's why the Moon appears to always show the same face. We see the same side of the moon and never get to view the far side from Earth.
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