Nevertheless, she persisted

This is from 10?th grade, marching band.

Her: Look, the moon is huge Me: ya

  1. Later …​

Her: Look! The moon moved so much Me: Yeh, celestial bodies tend to do that Her: Lol, who even says "celestial body". You’re so wild (friendly tone)

Why did I say that? I think I just wanted to sound smart / crack a joke.