Planet and moon resizer
It can be difficult to imagine the scale of planets and moons, because (1) they're really big and (2) they're far away. From where we are, the stars look pretty small, but in reality, they shiny objects might be several times larger than our own planet. In this straightforward interactive, Brian Lukis shows how planet and moon sizes compare. Simply select between the apparent view and the absolute to see how perspective seemingly changes size.