By Andrew Solway
By John Archibald Wheeler
By Sobel, Dava
By Sean Carroll
By John Gribbin
By Lawrence M. Krauss
By Carl Sagan
By Cesare Emiliani
By Stephen Hawking (University of Cambridge)
By Frank Close (Professor of Theoretical Physics and Fellow of Exeter College, University of Oxford)
By Jon Kirkwood
By Angela Royston
By Buzz Aldrin, Leonard David
By Alvin Jenkins, Steve Jenkins
By Gina McIntyre, Matt Duffer, Ross Duffer
By Alex Frith, Jerome Martin, Alice James, Federico Mariani, Shaw Neilsen
By Professor Brian Cox, Andrew Cohen
By Michael Carlowicz
By David Baxter
By Neil Skinner
By A. Meharg
By Galileo Galilei
By Paul Weissman, etc., Lucy Ann McFadden (University of Maryland, College Park, USA), Torrence Johnson (Jet Propulsion Laboratory, Pasadena, California
By Frank Wilczek (Author)
By Galileo Galilei, Albert Van Helden
By Katie Daynes, Marta Alvarez Miguens