Which of the following describes a major danger of interstellar travel at near-light speed?
A) Atoms and ions in interstellar space will hit a fast-moving spacecraft like a flood of dangerous cosmic rays.
B) Time dilation will slow the heart beats of the crew to a dangerously low rate.
C) Asteroid fields floating in interstellar space will present a navigational challenge.
D) Any interstellar journey will take much longer than the lives of the crew members.
A
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Suppose someone tells you that the Sun generates its light and heat because it is a giant ball of fire. Would you agree? Why or why not?
What will be an ideal response?
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