File fix-desktop-file.patch of Package celestia
--- a/src/celestia/gtk/data/celestia.desktop
+++ b/src/celestia/gtk/data/celestia.desktop
@@ -1,13 +1,12 @@
[Desktop Entry]
-Encoding=UTF-8
Version=1.0
Type=Application
-Exec=celestia
+Exec=celestia-gtk %f
Icon=celestia
X-GNOME-DocPath=
Terminal=false
-Name=Celestia (Gtk+)
+Name=Celestia (GTK)
GenericName=Space Simulator
Comment=Explore the Universe in this detailed space simulation
-StartupNotify=true
-Categories=Astronomy;Education;Application;
+Categories=Astronomy;Education;Science;
+MimeType=application/x-celestia-script;