A new version of the N900 orrery has been uploaded into the Extras Testing repository. Two new pages have been added: Planet Elevations and Planet Phenomena. Also, the app generates a legible display when the window manager minimizes it, as explained here. If you use the orrery app, please give the new version a try, and if you like it please consider voting it out of jail.

It's not the best app for the N900 (by a long shot), but it may be the best documented.