Celestial Sphere Explorer
Change observer latitude and sidereal angle to see how the celestial poles, horizon and a sample star move.
NCP altitude35°
Interactive model — simplified for intuition, not precision ephemerides.
Concepts in this lab
altitudeazimuthdeclinationsidereal motion
Connected topic
Open lessonCelestial sphere
A complete introduction to Celestial sphere within Celestial sphere & coordinates, linking observations, physical models, history and modern applications.