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A comment on SpaceX: Making Life Multiplanetary [video]. Parent comment

Re:SpaceX: Making Life Multiplanetary [video] by grondilu on Friday September 29, 2017 @03:43AM (#15363470)
> the heat shield ablates for Mars trips but not Earth trips (not sure why).

I suppose the reentry speed on mars is much higher, since it happens at the end of an interplanetary trip.

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Re:SpaceX: Making Life Multiplanetary [video] by rkangel on Friday September 29, 2017 @06:58AM (#15364222)
For E2E routes, the rocket doesn't have to be given as much kinetic energy - it doesn't have to escape Earth's gravity well.
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