So if Peter was 8 years old when taken (if he was born in 1980 and taken in 1988). Isn't he a little 'too Earth-quippy' for an 8 year old kid?
I don't think there are many 8 year old kids who would have the knowledge to throw out something like paraphrasing "Good thing she didn't turn on a black light or it'd look like Jackson Pollock painting in here."
He's not still an eight year old, though. He would have to know what a Jackson Pollock painting was, I agree. But I see no reason they wouldn't have blacklights in space. Maybe his mom was a really big Jackson Pollock fan, I don't know.