Question

What is the greatest challenge facing space programs that are trying to send human beings to other planets?
Providing activities that will decrease boredom and depression on such a long journey away from Earth.
O Providing enough rocket fuel to propel a space craft far enough to reach other planets.
O Providing medicine that will prevent death resulting from exposure to a zero gravity environment
O Providing the resources necessary for sustaining human life on such a long journey.
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Answer 1

Answer:

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