Stars & constellations

Explore the observer sky and full celestial sphere with star details, planets, Ptolemy and IAU constellation figures.

Use the shared time and location controls to explore stars and planets above and below the horizon. Select a star for its catalogue classification and position.

Jewish Cosmology is an interactive research and educational web application connecting Hebrew dates, traditional Jewish calendar calculations and halachic concepts of time with the observable motions of the Sun, Moon and planets, astronomical seasons and eclipses.

JavaScript is required for the interactive explorers and calculations. The descriptions and navigation remain available without JavaScript.