Where does the Moon's water come from?

2009 will be remembered as a year when humans first found the presence of water right on the Moon. But a question arises, where does the moon's water come from?

Earlier this year, NASA's Moon probe and India's Chandrayaan 1 spacecraft detected chemical traces of water on the Moon.

On November 13, NASA officially announced that it had found a large amount of water on the Moon after testing its decision. The LCROSS explorer ship (short for Remote Sensing Satellite and observing the Moon pits) launched a missile into the crater Cabeus, near the southern tip of the Moon, causing a big explosion and spotted water. was given after a spectral analysis of the amount of matter fired after the explosion.

Photo of some craters from India's Chandrayaan 1 spacecraft.The rich minerals in the left picture are blue around the craters.

Peter Schultz, Brown University, a scientist participating in the LCROSS project, questioned the presence of water on the Moon: 'Will water appear on the moon or has it been for billions of years?'. Currently, there are three main theories about the presence of water on the Moon.

1. It is the ancient volcanoes that spray water on the surface of the Moon

Water on the surface may be due to being sprayed from the lunar surface at the time when its core is very hot.

One hypothesis is that right away, there was water on the Moon, which is one of the components when creating this satellite, just like the Earth.

Paul Spudis, an expert at the Planet and Moon Research Institute, was funded by NASA, explaining that water is concentrated in the Moon in this idea. In the distant past, the Moon was "dead" but inside there was a very hot core like Earth. The volcanic movement of volcanoes slowly pushed water to the surface, where it was frozen until now.

2. Water is made right on the surface of the Moon

The solar winds that constantly blow towards the Moon carrying positive positively charged hydrogen ions can combine with oxygen-rich minerals to form water.

Some scientists argue that water on the Moon can be created right on its surface with help from the Sun.

According to this hypothesis, the Sun constantly emits a stream of charged particles, called the solar wind. Positive hydrogen charge ions, or protons from the solar wind can rush to the Moon and interact with oxygen-rich minerals here to create water molecules.

Schultz, Brown University, said: 'If so, the formation of water through the solar wind will be a very slow process. Luckily one day, a water molecule is accumulated '.

3. Asteroids and comets carry water to the Moon

The surface hole of the Moon not only has craters but also many traces of impact with comets and meteors.Perhaps one of them brought water.

Some argue that water on the Moon could be a gift brought by comets or steamy asteroids through long-ago collisions. Most water from such an impact will fire into space, but there are some slow elements that can be retained by the Moon's gravitational pull.

Spudis said: 'An idea is that comets or meteors have crashed into the Moon and created a cloud of steam hanging just above the surface of the Moon. Finally, an amount of water has moved to the polar regions, it can be retained in a "cold trap" (the region of eternal cold weather where sunlight cannot reach).