It is possible. Even likely. But, it most likely is in the Spirit World. It was the Moon and Ocean Spirits that left for the Human World. The Sun Spirit likely stayed.

I’ve always assumed it’s possible

Yo this is good because I’m starring as the new Avatar and you know we could actually use this in the new tv series

@KingGreeneIG Please keep comments legitimate, head-cannoning things is not helpful to having a proper discussion.

Um it was just an idea

I am referring to comments like "I'm starring as the new Avatar".

Oh I did not think you saw that my bad

Makes sense to me. When Jeong Jeong talks about the sun, it’s almost as if he’s personifying it, which to me suggests that there exists a sun spirit. Also, the sun seems like to great of a natural force not to have a spirit associated with it.