So here is a tricky little sort of post, everyone. The question of the day is “Is Princess Celestia the god (or goddess, whichever you prefer) of Equestria?” Well, we know she is definitely in charge. No questions there. But is she just a princess/ruler, a god, or The God?
If you look back into world history, there are many different deities who control the Sun, just as Celestia does. Helios in Greek mythology, for example, drove his sun chariot around the world every day, representing the sun rising and setting. So does the ability to control the sun with magic make her a god? Not in and of itself. The unicorns in the “Hearth’s Warming Eve” episode apparently had the ability to control the sun and moon through magic. It may have required multiple unicorns to use the magic, but they certainly aren’t considered gods.
It’s the combination of being a higher status (alicorn, princess) with the ability to control the sun that makes her a god. However, I only think she is a god, not with a capital G. I’m going with a very monotheistic approach to this answer, but I believe you can have either one God or multiple gods. Equestria falls into the latter.
So who else is a god? I think Princess Luna definitely falls into that category. With the exact opposite power, the ability to control the moon, Luna clearly has a similar amount of magical power. Also being an alicorn, she also has a higher status.
Princess Cadence, also an alicorn, is another possible god. However, I’m not sure if she qualifies since she hasn’t been given nearly as much screen time as the other two. Also, if her power is love then Shining Armor has a lot to do with it. And if you have to depend on someone else to have your power does it count the same way? See? I honestly don’t know.
To summarize: Princess Celestia is a god of Equestria along with Princess Luna. Both alicorns have a loftier status due to their alicorn-ness and both have supernatural powers beyond anypony else in Equestria. Cadence I’m unsure about. Anypony else have an opinion?