NASA puts an end to the mission of two scientific probes after spending a year exploring what lies beneath the surface of the satelliteThe U.S. Space Agency (NASA) plans to crash two small twin scientific probes on the Moon next week after spending a year exploring what lies beneath the lunar surface.The twin orbiters that have allowed scientists to know the internal structure and composition of the satelliteare being prepared for its descent and impact on a mountain near the lunar north pole Monday morning.Ebb and Flow, which form what NASA called GRAIL (Gravity Recovery and Interior Laboratory), being descended on purpose because of its low orbit and the fact that its low fuel excludes more scientific missions.The scientific mission of the two ships generated the highest-resolution map of the magnetic field of a celestial body. This map will allow a better understanding of how Earth and other rocky planets in the solar system formed and evolved."It will be hard to say goodbye," said GRAIL principal investigator, Maria Zuber, of the Massachusetts Institute of Technology (MIT). "Our little twin robots have been exemplary members of the family of GRAIL and planetary science has come a long way thanks to his contribution."The mountain where the two spacecraft will crash is located near the crater Goldschmidt. Both ships have been flying around the moon on the first day of 2012.---------------------------------------------------This Monday, just in case, take a motorcycle helmet because in case something falls on the moon and can kill me.Sources: NASA