To the moon (MIT)
Saturday’s launch of NASA’s Gravity Recovery And Interior Laboratory (GRAIL)
twin spacecraft, a carefully choreographed mission to precisely map the moon’s
gravitational field, could help scientists understand fundamental questions
about the moon’s composition, internal structure and evolution.
GRAIL’s principal investigator — Maria Zuber, the Earle A. Griswold Professor
of Geophysics and Planetary Science at MIT — becomes the first woman to lead a
planetary spacecraft mission.
Following the launch of the twin GRAIL spacecraft and a four-month journey,
GRAIL-A is scheduled to enter orbit around the moon Dec. 31; GRAIL-B will
enter lunar orbit the following day. GRAIL’s 90-day scientific mapping mission
will begin in March 2012.
“Technologically, it is blazing the trail for other planetary missions,” says
Zuber, the head of MIT’s Department of Earth, Atmospheric and Planetary
Sciences. “Using dual spacecraft in tight-formation flight, doing precise
timing and gravity measurement, you could envision future planetary missions
to Europa [one of Jupiter’s moons] to map currents in its subsurface ocean; to
Venus to map the circulation of its atmosphere; and to Mars to observe the
seasonal carbon dioxide cycle between its atmosphere and its surface.”
Analysis of data from the paired spacecraft will allow GRAIL to map …
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