awesome event, not only for nasa but i would argue just mankind. >> humankind. >> extraordinary. how are we able to do it? to me the first thing i thought of is how is this craft able to have the energy to go that far? is this solar powered, does it run off of gravity? you certainly don't have gas for 3 billion miles. >> there is no atmosphere in space, so when you take off on a rocket and you break the surly bonds of earth, once you've done that, there's nothing to stop it. it is a constant movement. here's what's interesting. this was the fastest rocket nasa has ever launched. 32,000 miles per hour as it sped through space. and then it got the sling shot action around jupiter, propelling it on towards pluto. so also on board are these radio isotope thermal generators. that's what's helping the spacecraft make minute moves and