Now this will get us to Mars quicker!
…the 5M15, which runs on compressed liquid methane. The odorless substance has multiple advantages over conventional rocket propellants: It’s cheaper, it requires much less insulation, and it exists on several planets NASA hopes to travel to ? Mars, here we come. That means astronauts could collect their own fuel for the trip home.
See the discs? Each one is how many time over the speed to sound this baby will move; now that’s fast!











