矮行星
谷神星
Ceres
The dwarf planet of the main asteroid belt
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简介
Ceres is the largest object in the belt between Mars and Jupiter. It was discovered in Palermo by Giuseppe Piazzi on 1 January 1801. NASA's Dawn probe observed bright salt deposits there, possibly linked to underground brine.
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On its own it holds about a quarter of the mass of the whole asteroid belt.