If you were to design a spacecraft that could travel to the galactic center fast enough that the astronauts aboard aged by only 25 years during the trip, how fast would the spacecraft have to go? (Note: The galactic center is 25,000 light years away.)
A) 0.95c
B) 0.995c
C) 0.99995c
D) 0.9999995c
E) 0.999999995c

Question

Quizplus · Accepted Answer

To achieve significant time dilation where astronauts age only 25 years while traveling 25,000 light years, the spacecraft must travel at a speed very close to the speed of light. At 0.9999995c, time dilation is sufficient for this scenario.

If You Were to Design a Spacecraft That Could Travel