1ly = 9.454254*10^15 m
1y = 3.1536*10^7 s
c = 2.99792*10^8 m/s
23000ly/30y
= (2.3*10^4 * 9.454254*10^15)/(30*3.1536*10^7)
= 2.298409*10^11 m/s
see what the Lorentz factor is for 0.99999915c and I'm sure it will work out.
The distance from earth to the galactic centre is 23000 ly. What constant speed would be required to make the journey in 30 y of an astronaut's lifetime?
I know the answer should be 0.99999915c but don't know how to get there with time dilation or length contraction
1 answer