How Much Do You Actually Know About Space?

The two questions that catch nearly everyone are the hottest planet and the light year. Both feel obvious and both are wrong for the same reason: the name of the thing points you at the wrong answer.

Mercury is closest to the Sun, so it sounds hottest — but Venus has an atmosphere that traps heat, and atmosphere beats proximity. A light year contains the word year, so it sounds like time — but it is measuring how far light gets in that time.