Gravity Field of the Moon from the Gravity Recovery and Interior Laboratory (GRAIL) Mission | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Gravity Field of the Moon from the Gravity Recovery and Interior Laboratory (GRAIL) Mission

Type de publication:

Journal Article

Source:

Science, Volume 339, Ticket 6120, p.668-671, doi:10.1126/science.1231507 (2013)

URL:

http://dx.doi.org/10.1126/science.1231507

Mots-clés:

Moon, Planétiologie et sciences spatiales

Résumé:

Spacecraft-to-spacecraft tracking observations from the Gravity Recovery and Interior Laboratory (GRAIL) have been used to construct a gravitational field of the Moon to spherical harmonic degree and order 420. The GRAIL field reveals features not previously resolved, including tectonic structures, volcanic landforms, basin rings, crater central peaks, and numerous simple craters. From degrees 80 through 300, over 98% of the gravitational signature is associated with topography, a result that reflects the preservation of crater relief in highly fractured crust. The remaining 2% represents fine details of subsurface structure not previously resolved. GRAIL elucidates the role of impact bombardment in homogenizing the distribution of shallow density anomalies on terrestrial planetary bodies.

Notes:

Times Cited: 2