"The stars that you see in the night sky are actually stars from the age of the dinosaurs, because the light is taking so long to reach the earth." I heard this when i was about six years old (on a tv show about supernovas probably), and i was very disturbed that our picture of the sky was so out of date. I had a sneaking suspicion that we were missing out on a lot of good explosions, and was firm in my convictions that if the outer universe was to explode we wouldn't know until we were extinct. i was a philosophical little girl even then.
A childhood belief about outer space

others believed things like this
- I used to wonder that if man wanted to reach the stars in rockets, why didn't he just go up at night? Duh!!!— albinoavenger
- when i was was little i thought that pop stars were stars in space would pop— roman honytoast
- I used to think stars were really shaped like you draw stars!Anon
- I used to believe all the stars in the sky were really just aliens with flashlights shining them at Earth.— Lyssy
- When I was a kid, I thought the stars in the sky at night, were the balloons people let go.— Lisa
- I used to think that the crickets chirp at night was the stars twinkling.— James the Great