I thought people here might be interested in AllSky - and linking to HA - its a neat open source Pi program to capture night time images of the sky - so creating star trails:
It outputs images - so its easy to add into HA as a simple picture card:
I use it for an all day timelapse in HA with weather data overlaid, via IPTimelapse - it complicates things a bit but makes for a nice all sky image via a Pi, HQ camera and a low cost 180 degree camera lens.
Anyhow thought people might be interested - write up and free 3d print files are at:
https://connected-environments.org/blog/allsky/
Andy