eobanb

First question: Given that ion propulsion has such a high specific impulse and low fuel mass requirement but also a very high electrical energy requirement, do you ever see nuclear electric spacecraft becoming a realistic option for deep space travel? How might this be done?

It seems to me that even very large solar arrays won't do the job for large, complex (read: manned) missions to the asteroids and beyond.

Second question: are any of you involved in getting VASIMR on the ISS?

What do you think is going on behind the scenes in the TPP negotiations? What would be some tangible differences people would notice in their everday lives down the road if it were to be signed by the US?