DAVID PARKER / SCIENCE PHOTO LIBRARY DAVID PARKER / SCIENCE PHOTO LIBRARY
Galileo National Telescope (TNG). Octagonal dome of the TNG at the Roque de los Muchachos Observatory on La Palma in the Canary Islands at twilight. The TNG has a 3.5-metre diameter mirror on an alt-azimuthal mount. Its active optics system periodically adjusts the mirror's shape to compensate for flexure during movement or differences in air temperature around it. The telescope is in a 24-metre high dome to raise it above the heat haze near the ground. The telescope's high altitude (2358 metres), and the clear air above it, means that atmospheric distortions to incoming light are minimised. The TNG is operated by the Council for Astronomical Research (CRA) in Italy.
Model release not required. Property release not required.