Astronomical tables

In astronomy and celestial navigation, an ephemeris (; ; , ) is a book with tables that gives the trajectory of naturally occurring astronomical objects and artificial satellites in the sky, i.e., the position (and possibly velocity) over time. Historically, positions were given as printed tables of values, given at regular intervals of date and time. The calculation of these tables was one of the first applications of mechanical computers. Modern ephemerides are often provided in electronic form. However, printed ephemerides are still produced, as they are useful when computational devices ar

medieval astronomical work

astronomical data

A '''''''' () is an Islamic astronomical book that tabulates parameters used for astronomical calculations of the positions of the sun, moon, stars, and planets. thumb|Sanjufini Zij'' by Samarkandi astronomer Khwaja Ghazi al-Sanjufini. Compiled in 1363.

medieval astronomical tables

astronomical calculations

astronomical table and star catalogue published by Ulugh Beg in 1438–1439

medieval astronomical tables

Translated astronomy text