Images Dated 29th September 2003

Particle tracks on galaxies

Particle tracks and cosmology. Computer illustration of subatomic particle tracks (white spirals) seen with galaxies behind them. The tracks result from charged particles moving through a bubble chamber containing a superheated liquid. Ionisation of the liquid by the particles causes it to boil, so that tracks of minute bubbles are left in their wake. Each particle makes a distinct track, such as the spirals made by electrons and positrons. Galaxies are independent groups of stars bound together by mutual gravitational attraction. Particle physics has revealed the basic structure of the atoms which form everything in the universe

© MEHAU KULYK/SCIENCE PHOTO LIBRARY

Close-up face with glasses

© CSA-Printstock

533612605, Adult, Facial Expression, Illustration, Men, One Per, Pop Art, Smiling

Markus Foss/Glenn Patterson. British Rally Championship

Trackrod Rally 27th-28th September 2003. World Copyright - Jakob Ebrey/LAT Photographic