No concrete evidence explains why there is a moon. The best hypothesis presented is the Giant Impactor hypothesis: It suggests that around 4.45 billion years ago, while the Earth was still forming, a large object hit the Earth at an angle.Know More
How Stuff Works explains the Giant Impactor or Ejected Ring hypothesis: When the large object that was around the size of Mars hit the Earth, it threw debris into space from the Earth's mantle region and overlying crust. After the impact, the object of impact itself melted; and, it merged with the interior of the Earth. The hot debris merged to create the moon.
This hypothesis explains certain things, such as: why the moon has rocks that have a composition similar to the Earth's mantle, why the moon has no iron core, and, why moon rocks look as if they have been baked, although they have no volatile compounds. Computer simulations demonstrate that this hypothesis is possible.
Throughout the years there have been other theories to suggest why there is a moon. Some believe that the moon was made through fission and the Earth moved so rapidly on its axis that a large part of it during the molten stage spun off and formed the moon. Another theory is that the moon and Earth just happened to form at the same time. However, both of these theories have been proven wrong over time.Learn more about Our Moon
There is evidence that the moon is seismically active, which means it can experience the moon version of an earthquake. During the 1969 and 1972 moon landings, astronauts placed seismometers on the moon in order to allow scientists to learn more about earth's biggest natural satellite.Full Answer >
The surface of the moon is generally a light gray color, although there are parts of the moon that are made up of dark gray rocks. The moon has a different appearance from the surface, from space and from the Earth.Full Answer >
According to the Argonne National Laboratory, a human being weighs approximately one-sixth as much on the moon as he does on Earth. If an individual weighs 180 pounds on Earth, that weight is converted to 30 pounds on the moon.Full Answer >
The moon appears bright because the side visible on Earth reflects the light from the sun. As the moon and the Earth move around their respective orbits, different portions of the moon are visible to people on Earth, depending on the angle at which the light hits the moon and reflects back to Earth. The moon reflects back about 12 percent of the light from the sun that hits it.Full Answer >