An astronaut must journey to a distant planet, which is 211 light-years from earth. what speed will be necessary if the astronaut wishes to age only 15 years during the trip? (give your answer accurater to five decimal places.) hint: the astronaut will be traveling at very close to the speed of light. therefore, approximate the dilated trip time at to be 211 years

Explanation:

We know that the equation for time dilation will be:

where Δt its the time difference measured from Earth, and Δt' is the time difference measured by the astronaut.

Lets work a little the equation

So, we got our equation. Knowing that Δt=211 years and Δt'=15 years

then

it about 600 mph from what i calculated

i believe the answer would be:

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