1991 Gallery

1991 British GP

SILVERSTONE, UNITED KINGDOM - JULY 14: Ayrton Senna, McLaren MP4-6 Honda, with sparks flying at Bridge corner during the British GP at Silverstone on July 14, 1991 in Silverstone, United Kingdom. (Photo by Ercole Colombo / Studio Colombo)

© Motorsport Images

Action, Bridge, F1, Formula 1, Gp, Sparks, Vanity

Optical photo of the star Sirius using star filter

The two bright stars just below centre are Alpha Centauri (left) & Beta Centauri. To their right are the four stars forming the constellation of the Southern Cross, or Crux Australis. Alpha Centauri, also known as Rigil Kent, is a triple star system, the two brightest components of which form a yellow-orange visual binary. The third component, Proxima Centauri, is the closest star to Earth at a distance of 4.3 light years. Beta Centauri, or Hadar, is also a binary star; it is much more remote at a distance of 424 light years. The photograph was taken from Pauhatanui, New Zealand. (North is at top). 50mm, f/2, 20 sec exposure, Fujichrome 1600 + 2, photographed from Pauhatanui, New Zealand

© JOHN SANFORD/SCIENCE PHOTO LIBRARY

Cut and polished crystal of imperial topaz

A cut and polished crystal of imperial topaz. Topaz is a silicate of aluminium and fluorine and can occur in many colours including yellow, blue, green, violet, reddish-brown and colourless. Clear or finely-coloured varieties, such as that seen here, are used as gemstones

© VAUGHAN FLEMING/SCIENCE PHOTO LIBRARY

Imperial, Imperial Topaz, Mineral, Topaz