Can we trust Monty Python’s science?

I like Monty Python a lot.  A weakness of mine is to assume that people I like are also intelligent. Motorhead’s lyrics are ironic, whereas Kiss’ songs are kind of dumb. Even if I think Monty Python’s Eric Idle is smart, is it safe to assume that he bothered to get his facts straight when he wrote “The Galaxy Song?” Good question. Let’s take a look.