Jewish CosmologyExplore Jewish time through astronomy.

Accumulation and integrals

A strip contributes height times width. Above the axis is positive; below is negative. A negative contribution is not negative physical area. הצטברות ואינטגרלים

הצטברות ואינטגרלים

Unlock this animation

One-time payment · ILS 50.00 for the full animation library.

Browse the animation library

Spherical geometry

Watch the sides and angles of a spherical triangle change together.

Calculus

Follow the tangent as it moves along a curve.

Interpolation

Compare estimates between known points on a curve.

The observer’s sky

See the Sun and stars cross the dome above Jerusalem.

The sky in 360°

Watch the same sky from a fixed viewpoint as daylight comes and goes.

Rambam’s nine galgalim

See the nested spheres and their shared daily motion around Earth.