Mars orbits the Sun in 687 days, which means 1Earth year on Mars is 687 days.
火星绕太阳公转的周期是687天,这意味着火星上的1个地球年是687天。
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If the Earth-Sun distance were as little as 1 percent larger, runaway glaciation on Earth about 2 billion years ago would have caused the oceans to freeze and remain frozen to this day.
If the Earth-Sun distance were as little as 1 percent larger, runaway glaciations on Earth about 2 billion years ago would have caused the oceans to freeze and remain frozen to this day.