By Kirshner, Robert P.
By Hoyle, Fred, Wickramasinghe, Chandra
By Challoner, Jack, Jack Challoner
By Norton, Arthur P., etc.
By Melvin and Gilda Berger
By Geddes, Linda
By Man, John
By Natural History Museum
By Patricia Whitehouse
By Lemonick, Michael D.
By Sagan, Carl, Druyan, Ann
By Crump, Thomas
By Gilmore, Iain
By L Goodstein, David, Goodstein, Judith R
By Moore, P
By Schattschneider, Peter
By Shirley, J.H., Fairbridge, Rhodes W.
By Yiğit, Erdal
By Ramachandran, Bhaskar, Justice, Christopher O., Abrams, Michael J.
By Heidarzadeh, Tofigh
By Solomone, Stacey
By Pirajno, Franco
By Aplin, Karen
By Cleland, Carol E.
By Gonzalez, Walter, Parker, Eugene
By Adushkin, Vitaly, Nemchinov, Ivan
By Bychkov, Vladimir L., Golubkov, Gennady V., Nikitin, Anatoly I.
By Lübken, Franz-Josef