/usr/share/xscreensaver/config/galaxy.xml is in xscreensaver-data-extra 5.15-2ubuntu1.
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 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="galaxy" _label="Galaxy">
<command arg="-root"/>
<number id="delay" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="100000" default="20000"
convert="invert"/>
<number id="count" type="spinbutton" arg="-count %"
_label="Count" low="-20" high="20" default="-5"/>
<number id="cycles" type="slider" arg="-cycles %"
_label="Duration" _low-label="Short" _high-label="Long"
low="10" high="1000" default="250"/>
<number id="ncolors" type="slider" arg="-ncolors %"
_label="Number of colors" _low-label="Two" _high-label="Many"
low="10" high="255" default="64"/>
<boolean id="spin" _label="Rotate viewpoint" arg-unset="-no-spin"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
<_description>
This draws spinning galaxies, which then collide and scatter their
stars to the, uh, four winds or something.
Written by Uli Siegmund, Harald Backert, and Hubert Feyrer; 1997.
</_description>
</screensaver>
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