NASA to measure moon’s gravity
NASA (TELEGRAPH): NASA’s twin robotic Gravity Recovery and Interior Laboratory (GRAIL) probes have begun a 90-day mission gathering data to create the first complete high-resolution map of the Moon’s uneven gravitational field.
Pair of space probes are to rendezvous in a £300m mission to map the Moon’s uneven gravitational field. GRAIL will fly the twin spacecraft in tandem orbits around the moon for several months to measure its gravity field in unprecedented detail.
The 90-day mission will hope to answer longstanding questions about Earth’s moon and provide scientists a better understanding of how Earth and other rocky planets in the solar system formed.
The Moon is the most accessible and best studied of rocky, or “terrestrial”, bodies beyond Earth. Unlike Earth, however, the Moon’s surface geology preserves the record of nearly the entirety of 4.5 billion years of solar system history.
Observations combined with samples of surface rocks which have already been returned to Earth, show that no other body preserves the record of geological history so clearly as the Moon.
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