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来自MSN9 个月
Scientific definition of a planet says it must orbit our sun: A new proposal would change thatThe good news is that in the solar system, celestial bodies larger than 10 21 kg appear to be round. So all bodies that satisfy the proposed lower limit on mass of 10 23 kg are expected to be ...
If the team’s version of planetary definition is indeed widely adopted — and to be clear, that’s a long shot at best — it would greatly expand the number of planets in our solar system ...
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