Why moon is near to earth & if Moon is came out from earth then why not moon had its atmosphere?

Answer 1

The moon did not come from from the earth and its gravity is not strong enough to hold an atmosphere.

The moon is slowly moving away from the earth as the earths rotational spin slows.

Answer 2

One of the leading theories about the formation of the moon describes a mars sized object slamming into the young earth billions of years ago. The molten debris that was flung from the collision formed a ring around the earth and eventually collected together to form the moon. Originally the moon was much closer to the earth, but with the formation of the earth's oceans and their pull on the moon, the moon has steadily been moving away by roughly 1.5 inches every year. Billions of years from now, the moon will leave earth altogether.

Back when the solar system was forming, the earth itself didn't have much of an atmosphere and was at least partially molten but as gasses escaped from the cooling earth's interior and more collisions with comets and such brought water and other materials, an atmosphere formed. More importantly, the atmosphere stayed thanks to the earth's gravity.

Whatever gases the moon got from impacts by comets and such would never stay, as the moon is too small to have enough gravity to hold onto an atmosphere.

Answer 3

Some recent theories about the formation of the moon do suggest that it may have formed from a collision of a planetoid with the earth while the earth was still forming. At the time there was probably little atmosphere on the earth but even if there was, you would not expect it to reform with the moon. First because of the high energy, heat, and turbulence of such a collision, and second because the moon's gravity is only about 1/6 that of the earth. It could not retain an atmosphere.

Answer 4

Whoever told you that Moon came out from Earth?

That person probably is fooling around with you....

Intellectual beings back when the moon was formed didn't get the chance to record how the moon got there in the first place but the moon has some significant function. She may not look much but she actually do a lot for Earth. Let me give you an idea:

The gravitational attraction, and the centrifugal forces generated by the rotation of the Moon and Earth around a common axis, the barycentre, is largely responsible for the tides on Earth. The energy dissipated in generating tides is directly responsible for the reduction in potential energy in the Moon-Earth orbit around the barycentre, resulting in a 3.8 cm yearly increase in the distance between the two bodies. The Moon will continue to move slowly away from the Earth until the tidal effects between the two are no longer of significance, whereupon the Moon's orbit will stabilise.

"I hope that slightly answers your question...."

Answer 5

"...Why moon is near to earth..."
The moon is believed to have formed from the debris blasted off into space when a Mars-sized object slammed into Earth billions of years ago. It took thousands of years, but eventually that debris formed into what we call the moon, and at that time it was only about 14-thousand miles away. Since then it's been moving away from Earth at a rate of about 1.5 inches per year. Check this website for a cool animation of the collision ==>http://bcs.whfreeman.com/universe6e/pages/bcs-main.asp?v=category&s=00110&n=01000&i=09110.07&o=|09000|01000|&ns=0

"...why not moon had its atmosphere?..."
The debris from the collision between Earth and that huge object was blasted out into space where there is no atmosphere. In other words, where the moon formed there was no atmosphere.

Answer 6

The Moon does not have an atmosphere because it does not have sufficient "gravity" to retain gases.