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The role of Mercury’s core density structure on its longitudinal librations

✍ Scribed by Dumberry, Mathieu; Rivoldini, Attilio; Van Hoolst, Tim; Yseboodt, Marie

Book ID
120528065
Publisher
Elsevier Science
Year
2013
Tongue
English
Weight
575 KB
Volume
225
Category
Article
ISSN
0019-1035

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As Mercury orbits the Sun, gravitational torques on its equatorial elliptical shape give rise to a planetary libration. The amplitude of Mercury's libration, as determined from Earth-based radar speckle pattern observations, suggests that only the mantle participates in the motion. This indicates a