“Sentience” is like this hand-waving magic word. Defined typically as the ability to experience sensations and feelings, it’s very anthropic and egocentric.

We know that life evolved on Earth, to include our own species. We know that much life on Earth has an internal sense for pain and pleasure, as well as many instinctual drives like self-preservation. We know that our species knows things, and we know that other species don’t have the same depth in their capacity to know things. We’ve demonstrated that other species don’t seem to understand the world in the same way as us humans. Yet, we’ve never quite figured out what any other species knows. We’ve never modeled their form of sentience, let alone our own. We only really know about sentience intuitively, via our own experience. We judge everything’s capacity as though it’s either less than, equal to, or greater than our own — without consideration for how something might just be different. Not higher or lower, but parallel in a way.

I don’t know what sun sentience would be like, not any more than I already know why any sentience is like, but I can say one thing for sure. Our own sentience is heavily influenced by bias: social, political, legal, economical, financial, emotional, religious, moral, and scientific bias. Peel back those layers of bias, what’s left? Sun sentience might be something like that, like a blank slate that just exists.