The Rotating Sky Module

The NAAP Rotating Sky Module introduces the horizon coordinate system and the “apparent” rotation of the sky. The relationship between the horizon and celestial equatorial coordinate systems is explicitly explored.

First time users of NAAP materials should read the NAAP Modules – General Overview page.

The Rotating Sky (pdf)

Horizon Coordinate System

• The “Observer”
• Two Systems – Celestial, Horizon

Rotating Sky

• Paths of the Stars
• Bands in the Sky
• Rotating Sky Explorer [swf]