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Using today’s chemically fueled rockets, flights to the Red Planet could take seven months or more, potentially exposing astronauts to long periods of radiation....
Having humans cooped up in confined spaces for months could also lead to mental health problems and disagreements among crew members. Advertisement One of the main challenges of sending humans to Mars is the great distance between the planets....
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华盛顿邮报-政治
2023-07-27 00:00:00.0