I built Zenith: a live local-first fixed viewport planetarium

This is an interesting concept. I also like the idea of projecting onto a ceiling of a room. It is always surprising the first time you try using an non-tracking telescope to see how fast the earth is turning. This gives you that without a telescope being necessary.

I block location requests, so it's just showing me the default location as Stonehenge. It would be interesting to allow the user to manually add location coords.