I have to admit, this is freaking amazing. It's like watching the science fiction of yesteryear coming to life in front of us. Methane fuelled (video) spaceships that travel to the outer solar system, refuel and return may well happen within my lifetime. That makes me so happy that they could find out that computer processors can't get any faster and still not get me upset.
Ha ha, Arthur C. Clarke would be so happy if he were year. Now all we need is to get spaceships that travel on steam and we can make Asimov happy too. The more the merrier. I want interplanetary travel so much! Even if I don't get to go! Armchair enthusiast out.