You can take several exposures of pictures of space and combine them to see what is really out there!! This is amazing! Very technical, but amazing….
MIT students spent less than $150 to send a camera to space and had it take pictures every 5 seconds the entire trip up! You can read about it more, and also look at the links on this page to see their project website:
You can install updated firmware in Canon cameras that “unlock” features that are usually only available on an SLR. Maybe this is something to install on one of your old compact cameras?