Essentially what Tippet and University of Maryland astrophysicist David Tsang developed is a mathematical formula that uses Einsteins General Relativity theory to prove that time travel is. How is Einsteins equation Gmn 8pG Tmn actually applied. Time is equal DistanceSpeed.
Lets be honest - sometimes the best travel time calculator is the one that is easy to use and doesnt require us to even know what the travel time formula is in the first place.
Though referenced in HG. Converting the units the speed is 750 ms. Einstein used the mathematical equation for speed or distance traveled divided by time to get to work on this problem. Though referenced in HG.