"Ah, I see where you are coming from. In this case, my name is most connected to the particular celestial body that I raise, the sun. Just as my sister, Princess Luna, raises the moon in Equestria each night."

Of course, 'celestial' also meant 'supremely good', but she only tried, and wouldn't claim to succeed.

And as if that didn't raise enough questions, Celestia chuckled at his next inquiry. "Our hooves and our mouths are capable of manipulations, and those of us with horns also have our magic."