If you've ever wondered how much of the Earths surface actually sits directly beneath the Sun at any given moment, then you probably also gave up on the math pretty quickly. Luckily, Randall Munroe didn't.

If you draw lines from the edge of an object in space straight to the center of Earth, there's an angular size traced out on the planet which, depending on the object in question, might surprise you. So the Sun and Moon both cover a patch about the same size as London, whereas Phobos covers a ping pong table.

Perhaps most mind-boggling, though, is that fact that Voyager 1 and 2 cover a spot about the same size as an E. Coli bacterium. Huh. Check out Munroe's full graphic below, or over at XKCD. [XKCD]