By Dr Sten Odenwald
By Chris North, Sir Patrick Moore
By Ritchie, Rob
By Lia Leendertz
By HEATHER COUPER, Nigel Henbest
By Tiffany Francis-Baker
By Orzel, Chad
By Burnham, Robert, Levy, David H.
By McEvoy, J.P., Zarate, Oscar
By Professor Jay M Pasachoff (Williams College Massachusetts), Roger Tory Peterson
By Storm Dunlop, Wil Tirion, Royal Observatory Greenwich, Collins Astronomy
By Cadbury, Deborah
By Christopher R. Kitchin
By Ian Ridpath, Wil Tirion
By Bauval, Robert, Hancock, Graham
By Singh, Simon
By Peake, Tim
By Oliver Morton
By Sobel, Dava
By Martin Rees
By Levin, Janna
By Michael Hoskin (, Fellow of Churchill College, Cambridge)
By Pirani, Felix
By Cox, Professor Brian, Cohen, Andrew
By Duncan G. Steel
By Peter Bond, Harrison Schmitt
By Carl Sagan
By Professor A. Roger Ekirch