Bayesian interior models find rock fractions of ~60% in the heavy-element envelopes of both Uranus and Neptune, with Neptune showing rock-rich mantles (~55%) and Uranus ice-rich mantles (~41%).
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Proposes AMBITION, a cryogenic comet nucleus sample return mission, to address open questions in cometary science that require Earth laboratory techniques after the Rosetta mission.
citing papers explorer
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Reassessing planetary composition: Evidence of rock-dominated envelopes in Uranus and Neptune
Bayesian interior models find rock fractions of ~60% in the heavy-element envelopes of both Uranus and Neptune, with Neptune showing rock-rich mantles (~55%) and Uranus ice-rich mantles (~41%).
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AMBITION -- Comet Nucleus Cryogenic Sample Return (White paper for ESA's Voyage 2050 programme)
Proposes AMBITION, a cryogenic comet nucleus sample return mission, to address open questions in cometary science that require Earth laboratory techniques after the Rosetta mission.