Mercury - (tidally locked) Very weak magnetic field (why,...

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Mercury No atmosphere Surface: cratered, with scarps (cliffs) indicating shrinkage of the planet (metal core cooled and shrank) Interior: large metal core (most of Mercury’s radius is the metal core) Rotation: very slow
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Unformatted text preview: (tidally locked) Very weak magnetic field (why, in spite of large metal core?) Steep long cliffs (scarps) formed when the core cooled, shrinking the planet by ~20 km. Mercury seems to be geologically dead now....
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