Picture Credits

Paul Doherty, 44, 94. lladfield, Cdr H. R., 2. P.A. Holm, 21. Hubble Space Telescope, 57. Kronheim & Co. London, 9. NASA, 45, 60, 61, 69, 156. G. & WB. Whittakers, T. CadelJ & N. Hailes, I "ondon, 23.