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diff --git a/doc/kstars/jmoons.docbook b/doc/kstars/jmoons.docbook new file mode 100644 index 00000000..40a7d7b7 --- /dev/null +++ b/doc/kstars/jmoons.docbook @@ -0,0 +1,38 @@ +<sect1 id="tool-jmoons"> +<title>Jupiter Moons Tool</title> +<indexterm><primary>Tools</primary> +<secondary>Jupiter Moons Tool</secondary> +</indexterm> + +<screenshot> +<screeninfo> +The Jupiter Moons Tool +</screeninfo> +<mediaobject> + <imageobject> + <imagedata fileref="jmoons.png" format="PNG"/> + </imageobject> + <textobject> + <phrase>Jupiter Moons Tool</phrase> + </textobject> +</mediaobject> +</screenshot> + +<para> +This tool displays the positions of Jupiter's four largest +moons (Io, Europa, Ganymede, and Callisto) relative to Jupiter, +as a function of time. Time is plotted vertically; the units are days +and <quote>time=0.0</quote> corresponds to the current simulation time. +The horizontal axis displays the angular offset from Jupiter's position, +in arcminutes. The offset is measured along the direction of Jupiter's +equator. Each moon's position as a function of time traces a sinusoidal +path in the plot, as the moon orbits around Jupiter. Each track is +assigned a different color to distinguish it from the others; the name +labels at the top of the window indicate the color used by each moon. +</para><para> +The plot can be manipulated with the keyboard. The time axis can be +expanded or compressed using the <keycap>+</keycap> and +<keycap>-</keycap> keys. The time displayed at the center of the window +can be changed with the <keycap>[</keycap> and <keycap>]</keycap> keys. +</para> +</sect1> |