Raspberry Pi notes.
20180525/DuckDuckGo raspberry pi planetarium projector
Yes you can, but you can do better than this one, of course.
20180525/http://projectable.me/3d-printed-raspberry-pi-powered-planetarium-projector-nightlight-part-1/
Other interesting random projects from this site.
20180525/http://projectable.me/page/2/
20180525/http://projectable.me/building-an-internet-walkie-talkie-using-a-raspberry-pi-v3/
20180525/http://projectable.me/i-built-a-wifi-walkie-talkie-for-my-kids-now-you-can-too/
20180525/http://projectable.me/optimize-my-pi-wi-fi/
20180525/http://projectable.me/msi-gtx-1050ti-4g-oc-the-poor-mans-1u-inference-gpu/