Motions of the sun, moon, and planets on the celestial sphere

Let's adopt the convention of imagining the sky once each sidereal day, when the same star is overhead.

We thus think of the celestial sphere with the stars fixed on it.

We can draw pictures of the positions of the sun, moon, and planets on the celestial sphere as viewed from the inside, as we see it.


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Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR 97403 USA soper@bovine.uoregon.edu