Much appreciated Folks, that’s all most helpful. Certainly Stellarium seemed the most promising (least worst?) of the 3 packages I tried initially. I spent a half-day on it yesterday trawling through the 420-page instruction manual and so far I’ve moved the output to about half-way to where I’d like it. I found the planetary satellite displays you mentioned, I can see that being useful. It would be good to keep Megastar going if possible so I’ll try Emil’s dowload, and check out the Aladin link too. Much appreciated. Alan.
British Astronomical Association
Supporting amateur astronomers since 1890