As a very little kid I remember being taken to the planetarium to watch some film about the solar system. The narrarator gave the specific distance between Earth and various other planets. I was outraged because they were obviously making this all up. The only way to record distance was by looking at the mileage numbers on a car's dashboard as you drove. I was smart enough to know you couldn't drive to Mars!
A childhood belief about outer space

others believed things like this
- I used to believe a mile was the distance between telephone poles.— Allegra
- Airplanes got places faster because it was actually a shorter distance up there.Anon
- when I was small I always thought that the solar system ended, and then it was just white paper after that— sparrow
- I used to believe that self drive cars actually drove themselves!Anon
- I used to believe that numbers had gender, that the odd numbers were boys and even numbers were girls. — Evelyn
- Before I went to a planetarium for the first time, I thought it was just a room full of plants. Anon