GW1670, Johannesburg, January 2004: Sentech. satellites. All the major television stations use this facility for transmissions of their programs. satellite, technology, broadcast. edge. Photograph: Graeme Williams/South Photographs
The South African Astronomical Observatory (SAAO) is the site of a series of major telescopes all relocated to a hilltop near Sutherland in the Karoo. A wide range of research in optical and infra-red astronomy is conducted at the site as well as seismographic studies especially to monitor earthquakes and nuclear explosions. It is situated at a height of 1759m above sea level in an area of the Karoo far from city lights and pollution. With it's clear dark sky and clear weather spread throughout the year, the area is known as one of the best astronomical sites on Earth.
A wind farm is a collection of wind turbines which are used to generate electrical power through their mechanical motions as they are pushed by the wind. The Energy generated by a wind farm can be fed directly into the general energy grid after passing through transformers.