CGP Grey is back to lay some knowledge down. So which planet is closest to earth? Whatever you guess, you are wrong. The difference is in how we learned the planets in their order from the sun. They don’t line up that way in reality. Here we get an amazing visualization of the planets in orbit around the sun, in their own speeds and paths, that might just blow your mind. You might also want to see a companion video that explores how the question is asked.
[via reddit]