I've discovered how to hide the cursor while in Celestia on my PC. First turn on Mousekeys by going to settings/control panel/accessibility options, choose the mouse tab. click on the "use mousekeys tab" click on the settings button of that tab. Decide whether you want the feature to work with the number lock on or off. If the choice is on, then go turn your number lock on. So far, all this has been to get your mouse keys working. If they are working now, then if you press 7,8,9,4,6,1,2,or 3 on the NUMBER PAD your cursor will move a little(depending on the cursor speed settings). Repeated tappings of one of these numbers will show whether they're on. When you've got the mouse keys going, go to celestia and while in it press the Ins key of the NUMBER PAD (mine is on the number 0 key). THEN PRESS ONE OF THE NUMBER KEYS.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
TO GET YOUR CURSOR BACK PRESS DEL ON THE NUMBER PAD