Name	Known for
Willy Benz Self - University of Berne (as Professor Willy Benz) Self - University of Berne (as Professor Willy Benz) See fewer	The Planets (1999)
David Black Self - Lunar and Planetary Institute (as Dr. David Black) Self - Lunar and Planetary Institute (as Dr. David Black) See fewer	The Planets (1999)
Donald Black Self (as Dr. Donald Black) Self (as Dr. Donald Black) See fewer	The Planets (1999)
Eugene Cernan Self - Apollo 17 Astronaut (as Captain Gene Cernan) Self - Apollo 17 Astronaut (as Captain Gene Cernan) See fewer	The Last Man on the Moon (2014)
Athena Coustenis Self - Observatoire de Paris (as Dr. Athena Coustenis) Self - Observatoire de Paris (as Dr. Athena Coustenis) See fewer	Steps to the Future (2010)
Douglas Gough Self - Institute of Astronomy, Cambridge University (as Professor Douglas Gough) Self - Institute of Astronomy, Cambridge University (as Professor Douglas Gough) See fewer	The Planets (1999)
Mark Halliley Self - Narrator (voice) Self - Narrator (voice) See fewer	Equinox (1986)
Fred Hoyle Self - Astronomer (archive footage) Self - Astronomer (archive footage) See fewer	A for Andromeda (1961)
Geoff Marcy Self - San Francisco State University (as Professor Geoff Marcy) Self - San Francisco State University (as Professor Geoff Marcy) See fewer	Extreme Universe (2010)
Michel Mayor Self - Observatoire de Geneve (as Professor Michel Mayor) Self - Observatoire de Geneve (as Professor Michel Mayor) See fewer	Astronogeek (2015)
Chris McKay Self - NASA Ames Research Center (as Dr. Chris McKay) Self - NASA Ames Research Center (as Dr. Chris McKay) See fewer	Doppelgängers³ (2024)
Carolyn Porco Self - Lunar and Planetary Laboratory, Arizona (as Professor Carolyn Porco) Self - Lunar and Planetary Laboratory, Arizona (as Professor Carolyn Porco) See fewer	Star Trek (2009)
Didier Queloz Self - Observatoire de Geneve (as Dr. Didier Queloz) Self - Observatoire de Geneve (as Dr. Didier Queloz) See fewer	Astronogeek (2015)
Carl Sagan Self - Astronomer (archive footage) Self - Astronomer (archive footage) See fewer	Contact (1997)
Jerry Soften Self Self See fewer	The Planets (1999)
Sasa Vasilievski Self Self See fewer	The Planets (1999)