The Problems of Flying to Mars

Astronauts will have to worry about space radiation — and also each other

The Economist
Feb 25 · 6 min read
Photo: NASA/JPL-CALTECH

Sending people to Mars is a daunting prospect. It would take astronauts at least nine months to get there, they might spend a year on the planet itself, and they would then spend another nine months on the journey home. During that time they would be exposed both to high radiation levels…

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