Can 109 space missions, manned or not, have gone to the moon so far, 12 people have walked on it and three scientific satellites currently in orbit to be around, but no mission has yet look what is inside the . This is just for the first time, would the new "twin" GRAIL mission is preparing to send to NASA to the moon.
The mission, according to news agencies Reuters and French, consists of two identical satellites in order to consider jointly the fluctuations in the gravitational field of the satellite of the Earth and thus to give scientists an idea of the core, whether it is solid, liquid or a combination of both, and what information it contains. The moon is about one-sixth of Earth's gravity, but gravity is not the same everywhere.
Scientists are surprised, for example, because a term in the moon has the expected higher gravity, while some fields have been greater, indicating the existence of underground structures that increase the weight.
Scientists hope the new mission GRAIL (Gravity Recovery And Interior Laboratory), cost nearly half a billion dollars, will help them piece together the geologic "puzzle" of the Moon from the beginning of creation before about 4.4 to 4.5 billion years, when they believed that, after a giant impact on Earth of a body as Mars, huge chunks of material ejected into space, until gradually merged and formed the Moon.
The two satellites (Grail-A and Grail-B), which would reach the moon in the New Year will begin combined investigations in early 2012, from a height of 55 km, using radio waves to detect more subtle changes in the gravitational field creating a detailed "map" of the crust to the core. "I will never really understand the history of the moon, until we know what the inside looks like," said the responsible researcher Maria ZOUBERI of MIT. After sending GRAIL, which will last for three months (after the two satellites will fall on the Moon), NASA will send to Mars in November 2012, another scientific space lab, the Mars Science Laboratory.
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