What do you use Celestia for, and why?
As for myself, I use it for personal entertainment, because I find looking at the planets and stars in Celestia, and coding SSC and STC fun.
EDIT:
I forgot to include that in the poll.TERRIER wrote:I mainly use it as a night sky reference from my hometown location, and I also regularly check up on the Cassini mission.
People who use Celestia for night time stargazing can put it under "other".