Power requirements

[ffutures]

I think someone told me that (ignoring travel times) it actually takes less energy to travel from Earth to Mars than between Jupiter's moons. Can anyone point me at a source for this? And for energy requirements for other interplanetary journeys? Preferably something that I can use without breaking copyright?

Comments

[nelc.livejournal.com]

I just recalled that Jerry Pournelle covered this in a chapter in A Step Farther Out, with a series of tables covering travel between planets and the Jovian moons. Unfortunately, I can't find my copy right now, but IIRC I think he said that the dV requirements for travel between Jovian satellites was a lot kinder in dV requirements than between planets. Especially if you include landing and lift-off requirements, since the planets tend to be bigger than the Galilean moons.

[ffutures.livejournal.com]

OK, thanks, I may have a copy somewhere. I must be mis-remembering the Jupiter thing.