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The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure.
The twin GRAIL (Gravity Recovery and Interior Laboratory) satellites orbited the Moon from December 2011 to December 2012. The data they sent back deepened our understanding of the Moon’s gravity and interior composition. [2] GRAIL was NASA’s first planetary mission with instruments fully dedicated to education and public outreach. The ...
Way back in September, NASA's Jet Propulsion Laboratory sent a duo of Lockheed Martin-produced spacecraft toward one of its favorite test subjects, the Moon, as a part of its GRAIL mission ...
While results from the primary science mission are just beginning to be released, the collection of gravity science by the lunar twins continues. GRAIL's extended mission science phase began 30 August and will conclude on 17 December 2012. As the end of mission nears, the spacecraft will operate at lower orbital altitudes above the moon.
In 2019, a reanalysis of nearly 50 years of data collected from the Lunar Laser Ranging experiment with lunar gravity field data from the GRAIL mission, shows that for a relaxed lunar fluid core with non-hydrostatic lithospheres, the core flattening is determined as (2.2 ± 0.6) × 10 −4 with the radii of its core-mantle boundary as 381 ± 12 km.
SINGAPORE (Reuters) -China landed an uncrewed spacecraft on the far side of the moon on Sunday, a landmark mission aiming to retrieve the world's first rock and soil samples from the dark lunar ...
Queqiao-1, which is a third as massive as Queqiao-2, was the first relay satellite deployed to the far side of the moon, supporting the Chang'e-4 mission. The Queqiao-1, still operating despite a ...
Because of the Moon's synchronous rotation it is not possible to track spacecraft from Earth much beyond the limbs of the Moon, so until the recent Gravity Recovery and Interior Laboratory (GRAIL) mission the far-side gravity field was not well mapped. Gravity acceleration at the surface of the Moon in m/s 2. Near side on the left, far side on ...