“Rockets can’t fly in space! There’s no air for the engine to burn in space! And there’s no air for the rocket to push against in space! WE’VE NEVER LEFT EARTH!”

So goes the cry of people who don’t believe we landed on the Moon — at least, this is one of their claims. But it’s wrong. In spite of what they think, rockets can and do fly in a vacuum. Fuel and oxidizer mix and ignite in a combustion chamber causing a controlled explosion that is directed out through the engine bell. This forc