Ed Stone head shot

Ed Stone

Voyager Project Scientist and David Morrisoe Professor of Physics, California Institute of Technology

Edward C. Stone is an internationally known physicist who has served as project scientist for the Voyager program from 1972 to the present. As a graduate student at the University Chicago, he was inspired to enter the fields of planetary science and space exploration by the launch of Sputnik in 1957.

Stone was born in Knoxville, Iowa, on January 23, 1936. After receiving his undergraduate education at Iowa's Burlington Junior College, Stone attended the University of Chicago where he earned his master's degree and Ph.D. in physics. He then joined the staff of Caltech as a researcher, and became a full faculty member in 1967. In 1972, he became the Voyager project scientist.

Since the launch of the two Voyager spacecraft in 1977, Stone has coordinated the efforts of 11 teams of scientists in their investigations of Jupiter, Saturn, Uranus and Neptune. He also became nationally known as the JPL public spokesman during the planetary flybys, explaining the Voyager's scientific discoveries to the public. Highlights of his decade of leadership include Galileo's five-year orbital mission to Jupiter, the launch of Cassini to Saturn, the launch of Mars Global Surveyor and a new generation of Earth science satellites such as TOPEX/Poseidon and SeaWinds, and the successful Mars Pathfinder landing in 1997. Stone retired from JPL in April of 2001 and is currently working full-time at Caltech, teaching and doing research.

In the late 1980s through the 1990s, Stone served as vice chairman and chairman of the Board of Directors of the California Association for Research in Astronomy, which is responsible for building and operating the W.M. Keck Observatory with its two ten-meter telescopes on Mauna Kea, Hawaii. He also served as Director of the W.M. Keck Foundation.

In addition to becoming a member of the National Academy of Sciences in 1984, Stone has been recognized with numerous awards, among them the NASA Distinguished Service Medal and National Medal of Science.

Biographical information from Caltech; profile photo courtesy of the Smithsonian Institution.

Latest Planetary Radio Appearances

Ed Stone and Forty Years of Voyager in Space

It is most space fans’ favorite planetary science mission, and with good reason. We visit with the man who has been in charge of Voyager mission science for more than four decades.

Talking with JPL's Blaine Baggett and Ed Stone About "The Stuff of Dreams"

JPL’s Blaine Baggett and former JPL director Ed Stone talk “The Stuff of Dreams,” a documentary about an era in planetary exploration that was both exhilarating and exasperating. Emily Lakdawalla explains why Curiosity has joined the fraternity of backward driving rovers on Mars, and Bill Nye considers the not-too-distant future when airliners and spaceliners will share the sky.

Celebrating 35 Years of the Voyager Mission

Voyagers 1 and 2 just reached 35 years of travel in space. What a great reason to celebrate! Join Voyager Project Scientist Ed Stone, Ann Druyan, Emily Lakdawalla and Robert Picardo in this special live edition of our show. Bill Nye reports on a separate celebration in London and on the International Space Station, and Bruce Betts is back in fine form with Mat Kaplan for this week’s What’s Up.