Sir Joseph Norman Lockyer, (17 May 1836 – 16 August 1920), known simply as Norman Lockyer, was an English scientist and astronomer. Along with the French scientist Pierre Janssen he is credited with discovering the gas helium. Lockyer also is remembered for being the founder and first editor of the influential journal Nature.

Richard Anthony Proctor (23 March 1837 – 12 September 1888) was an English astronomer. He is best remembered for having produced one of the earliest maps of Mars in 1867 from 27 drawings by the English observer William Rutter Dawes.

Gregory P. Laughlin is a professor of astronomy and astrophysics at Yale University. He is interested in hydrodynamic simulations, the characterization of extrasolar planets and planet-forming environments as well as the far future of the universe.