Dad made a startling admission about his past, which resulted in the following conversation:
Dad: You know, Eli, when I was your age, I was so obsessed with the planets that I dressed up as Saturn for Halloween.
Me: Oh...
Dad: I had Grandma Lisa make me the costume. I think she wished I would just dress as something normal.
Me: Yeah, like Uranus!

I then proceeded to map out what my Halloween costumes would be for the next nine years. Eleven if you count Planet X and the asteroids.