David McNab
Karen Stone
饰:A&E Narrator
Dr. Sallie Baliunas
饰:Herself
Professor Willy Benz
饰:Himself
Dr. Donald Black
饰:Himself
Dr. Natalya Bobina
饰:Herself
饰:Himself (also archive footage)
饰:Himself (as Commander Charles 'Pete' Conrad)
Dr. Athena Coustenis
饰:Herself
Dr. Francisco Diego
饰:Himself
Farouk Elbaz
饰:Himself (as Dr. Farouk El-Baz)
Professor Gary Flandro
饰:Himself
Imre Friedmann
饰:Himself
Professor Douglas Gough
饰:Himself
Dave Grinspoon
饰:Himself
Dr. Don Gurnett
饰:Himself
Professor Truls Hansen
饰:Himself
Bill Hartmann
饰:Himself
Jim Head
饰:Himself
饰:Himself (archive footage) (as Sir Fred Hoyle)
Linda Hyder
饰:Herself
Andy Ingersold
饰:Himself
Sergei Khrushchev
饰:Himself (as Professor Sergei Khrushchev)
Joe Kittinger
饰:Himself (also archive footage)
Leonid Ksanfomality
饰:Himself
Professor Hal Levison
饰:Himself
David Levy
饰:Himself (as Dr. David Levy)
Professor Sir Bernard Lovell
饰:Himself
Mike Malin
饰:Himself
Mikhail Marov
饰:Himself
Professor Michel Mayor
饰:Himself
Chris McKay
饰:Himself
Hap McSween
饰:Himself
Professor H. Jay Melosh
饰:Himself
Steve Moises
饰:Himself
Professor Bruce Murray
饰:Himself (also archive footage)
Professor Eugene Parker
饰:Himself
Vladimir Perminov
饰:Himself
Carolyn Porco
饰:Herself (as Professor Carolyn Porco)
Dr. Didier Queloz
饰:Himself
Ray Reynolds
饰:Himself
Carl Sagan
饰:Himself (archive footage) (as Dr. Carl Sagan)
饰:Himself (as Dr. Harrison Schmitt)
Alvin Seiff
饰:Himself
Arnold Selivanov
饰:Himself
Yuri Silaev
饰:Himself
Brad Smith
饰:Himself
Larry Soderblom
饰:Himself
饰:Himself
Jerry Soften
饰:Himself
Stephen Squyres
饰:Himself
Ellen Stofan
饰:Herself
Edward Stone
饰:Himself (as Dr. Edward Stone)
Yuri Surkov
饰:Himself
Professor James Van Allen
饰:Himself
Jurrie Van Der Woude
饰:Himself
Sasa Vasilievski
饰:Himself
Professor George Wetherill
饰:Himself
Buzz Aldrin
饰:Himself (archive footage) (uncredited)
Dwight D. Eisenhower
饰:Himself (archive footage) (uncredited)
Yuri Gagarin
饰:Himself (archive footage) (uncredited)
Nikita Khrushchev
饰:Himself (archive footage) (uncredited)
Sergei P. Korolev
饰:Himself (uncredited)
Bob Layton
饰:Himself (archive footage) (uncredited)
饰:Himself (archive footage) (uncredited)
Samuel West
配:BBC Narrator
饰:Himself - Planetary Science Institute, Arizona
Neil Armstrong
饰:Himself
饰:Herself - Mount Wilson Observatory
饰:Himself - University of Berne
饰:Himself - University College London
饰:Himself - University of Tennessee
John F. Kennedy
饰:Himself
饰:Himself - Cosmonaut
饰:Himself - Director, Jodrell Bank, 1951-1981
饰:Himself
饰:Himself - San Francisco State University
饰:Himself - Observatoire de Geneve
饰:Himself - Lunar and Planetary Laboratory, Arizona
饰:Himself - Observatoire de Geneve
饰:Himself - Cornell University
饰:Himself - Univeristy of Iowa
Eugene Cernan
饰:自己
Mark Halliley
饰:Self - Narrator
David McNab
David Fairhead
David Fairhead
Ivan Moran
Michael deGruy
Ivan Moran
Christopher Riley