Islamic scholars transform an ancient device

A brief gamma-ray signal arrived shortly after the gravitational waves, linking two forms of observation.

The combined observations connected gravitational waves with light from the same distant event.

The article explains how moving plates and engraved scales model the visible sky for particular latitudes.

Users could solve problems involving stars, sunrise, direction, calendars and the hours of prayer.

Metalworking, calligraphy, geometric design and numerical tables were all necessary to produce a reliable instrument.

The 64-dish radio telescope officially opened near Carnarvon in the Northern Cape.

The observatory unveiled a striking radio image of the central region of our galaxy.

The inauguration marked a major South African contribution to global astronomy.

The array became a precursor to the wider Square Kilometre Array observatory.

The publication presents astronomy as a product of exchange among Chinese, Indian, Persian, Greek, Arab and Central Asian traditions.