When was the last time you thought about how a rocket moves through space? The average person is likely to know the basics of how planes direct themselves through the atmosphere, but rockets?

Rockets that are launching things into space, like satellites or space probes, don’t actually have much trouble getting past the Earth’s atmosphere. Rockets encounter most of the resistance when ...

Whether in the real world, depicted in cartoons, or in a hobbyist's back yard, rockets always seem to have fins. Or if not fins, at least some other kind of protrusions along the outside -- they're ...