Understanding the celestial sphere

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Understanding the motion of astronomical objects across the sky is important when planning an imaging session with SPIRIT. Two documents available on the Guides and documents page provide an explanation of the celestial coordinates system and target planning for objects in the skies above Perth.

A quick guide that explains the celestial coordinates system.
Celestial coordinates (PDF file, 2.1 Mb)

Fine tune your understanding of celestial motion and choose the best time to image objects of interest with SPIRIT.
Target Planning (PDF file, 3.4 Mb)