How many Apollo launches were there?

This is a posting that is unashamedly for Apollo nerds. If you are over sixty years old, you probably remember Apollo and lived the Moon landings, at least the first one, as I did. People of my generation are bathing in a stream of glittering memories as we pass the fiftieth anniversary of one epic [...]

Usain Bolt v the Saturn V rocket – who wins a race from a standing start?

If you are a fan of science fiction, one of the standard scenarios is the crushing weight that astronauts face on launch: the terrible pressure of terrific g-forces, suddenly slamming the helpless astronauts into their couches and the terrible effort to move that this produces. This is part of the legend of space flight. In [...]