/usr/share/applications/celestia.desktop is in celestia-gnome 1.6.1+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | [Desktop Entry]
Encoding=UTF-8
Version=1.0
Type=Application
Exec=celestia-gnome
Icon=celestia
X-GNOME-DocPath=
Terminal=false
Name=Celestia (GNOME)
GenericName=Space Simulator
Comment=Explore the Universe in this detailed space simulation
StartupNotify=true
Categories=Astronomy;Education;Application;
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