|>I'm a beginner in satellite observing, but found the following book |>to be most informative. Obviously, this reference isn't on the net, |>but you may still find it useful. |> |>"Observing Earth Satellites" |>by Desmond King-Hele |>ISBN: 0442248776 I thoroughly endorse this. It was this book that started me off when I got for my ~12th birthday. :-) best wishes, -- Neil Clifford <n.clifford@physics.oxford.ac.uk> http://www.physics.ox.ac.uk/sat/satintro.html