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.