I've discovered Celestia a while ago and don't want to miss to give you some feedback.
So here is a little list of some suggestions and ideas. I hope this is the right place for posting this. 1. Switch off labels with one shortcut
-> just like the possibility to switch off orbit lines for having a clear view. One button to switch off all labels and lines at once would be most perfect2. Hide active orbit line when getting closer to an object
At last displaying this line isn't really needed anymore when getting close to the target. Besides the line goes through the body which has a quite unnatural appearance.3. GoTo-Effect when selecting "satellites" by the context menu of a planet
When someone uses the satellite option by right-clicking a planet, he probably wants to go to the objects moon directly, not just marking him. A GoTo-Effect would be much more comfortable4. New option: labels and lines4.1 Changeable colours of (orbit-)lines /labels
(Orbitlines might be categorised into classes and single planets)
Years ago I've already tested Celestia. But when travelling through the solarsystem there was nothing but orbit lines with a quite dominating blue. Not only that the space atmosphere was decreased, there was just less clarity. Now I had another try and found out how to customise the colours by script. I'm completly happy now with a new number one space simulator. Customisation is really nice - but other users shouldn't spend hours for this4.2 Transparency effect of lines/labels
When you primarily want the view on celestial objects, but don't want to miss information.4.3 Fading orbit lines
E.g. you can locate an object better from distance and you get a sense of the movement. There was already a discussion in another thread: viewtopic.php?f=10&t=156885. Selecting objects by clicking label
Objects might be easier to be selected. At the moment you have to aim good6. Editing bookmarks
Possibility to rearrange (by up- and down button or just dragging) and overwrite/update saved bookmarks7. Object browser7.1 One browser for all objects
This means one resizeable browser window e.g. with the following tabs: Solar System, Star Catalogue, Eclipse Finder, Interesting Objects
7.2 Directly go to an object by double clicking its entry
Would be easier and faster.7.3 Further ideas (marking objects, layout)
...like on this threadpage: viewtopic.php?f=10&t=11773&start=15
I'm looking forward to see those realised. I think the possibility of marking objects of a special category (planet-systems, distances,...) has a big educational value.8. Navigation as in Google Earth
The right-click in Google Earth gives you a smooth movement to your point of choice. Transfered to Celestia, you would select an object by middle-click for example, then hold the button and move down to increase speed forward. Moving up lets you go backwards and moving right or left would give you a rotation. It's similar to "ctrl+left-mouse" but you have a controlable speed and you don't need multiple mouse-pulls to get forward. Also panning onto the ground, with a horizontal view would be a nice thing.
All in all Celestia is a great programm. As every software it's in a steady process of development. I think you (the developers) know the future steps best anyway. Graphical imrovements might be one or keeping data up to date another. But an important thing in my eyes is a new user interface, clearly structured and more intuitive. I saw some screenshots from Linux/Mac-Versions which are going into this direction. So as a Windows user I try to keep patient.