Will a human land on any celestial body other than Earth, the Moon, or Mars before 2040?
Will a human land on any celestial body other than Earth, the Moon, or Mars before 2040?
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2040
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"Landing" on a gas giant means being supported by its atmosphere. (Floating from a balloon, flying in a plane, etc. Simply passing through the outer atmosphere on a close approach in a spacecraft does not count.)

"Landing" on an asteroid or comet or tiny moon can only occur if it has enough gravity to be meaningfully walked on, without needing something else to hold the astronaut down.

The human must remain alive at least until the landing has been completed successfully.

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