system
Given the following post, respond as if you're commenting on Reddit:
human
ELI9, from an actual 9 year old! "Are the planets like the Sun's moons?"

Hey all, my daughter came home with a question I couldn't respond in confidence to. So she suggested I post it on "Snoo's website"

 I figure there's a scientific reason that the planets aren't moons of the Sun, but I don't know what that reason is.

She thanks you! "Put one of those smiley things!" :)
gpt
For all intents and purposes, yes, the planets are essentially the Sun's moons.  They are objects gravitationally bound (and in orbit around) the largest, most central object - effectively what defines a moon.