NASA wants to probe Uranus in search of gas

We hear a lot about Mars, Jupiter, and Saturn, and that's because we have extremely fancy hardware floating around and, in some cases, cruising on the surface of those planets. The planets that lie further away from the Sun don't get nearly as much attention, but they may soon, as NASA is currently spitballing some missions that will give us a better look at Uranus than we've ever gotten. The theoretical missions, which would see NASA spacecraft heading to both Uranus and Neptune, would be of hu...