Nasa prepares to crash probes into the surface of the moon on Monday night

Going out with a bang: Nasa prepares to crash probes into the surface of the moon in dramatic finale to year-long lunar mission The twin Gravity Recovery and Interior Laboratory spacecraft will crash on Monday nightMarks end of a year-long mission to the moon | UPDATED: 12:06 GMT, 14 December 2012 A year-long mission to learn what lies beneath the lunar surface will culminate next week with Nasa crashing a pair of small robotic science probes into the moon.