Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdeedu@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

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+<sect1 id="ai-csphere">
+<sect1info>
+<author>
+<firstname>Jason</firstname>
+<surname>Harris</surname>
+</author>
+</sect1info>
+<title>The Celestial Sphere</title>
+<indexterm><primary>Celestial Sphere</primary>
+<seealso>Celestial Coordinate Systems</seealso>
+</indexterm>
+<para>
+The celestial sphere is an imaginary sphere of gigantic radius, centered
+on the Earth.  All objects which can be seen in the sky can be thought
+of as lying on the surface of this sphere.
+</para><para>
+Of course, we know that the objects in the sky are not on the surface of
+a sphere centered on the Earth, so why bother with such a construct?
+Everything we see in the sky is so very far away, that their distances
+are impossible to gauge just by looking at them.  Since their distances
+are indeterminate, you only need to know the <emphasis>direction</emphasis>
+toward the object to locate it in the sky.  In this sense, the celestial sphere
+model is a very practical model for mapping the sky.
+</para><para>
+The directions toward various objects in the sky can be quantified by
+constructing a <link linkend="ai-skycoords">Celestial Coordinate System</link>.
+</para>
+</sect1>