Photo Gallery: JPL celebrates former director Ed Stone’s 80th birthday

Former Jet Propulsion Laboratory Director Ed Stone, the only person to serve as project scientist for the Voyager mission, smiles during a question-and-answer session. JPL celebrated Stone's birthday in the Pickering Auditorium on Monday, Jan. 25, 2016.

Former Jet Propulsion Laboratory Director Ed Stone, the only person to serve as project scientist for the Voyager mission, smiles during a question-and-answer session. JPL celebrated Stone’s birthday in the Pickering Auditorium on Monday, Jan. 25, 2016.

  (Tim Berger / Staff Photographer)

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Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, left, shakes hands with Joseph Savino. Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)

Photo Gallery: JPL celebrates former director Ed Stone's 80th birthday

Former JPL Director Ed Stone, a project scientist for the ongoing Voyager mission, received recognition by his peers on Monday inside the Pickering Auditorium at JPL.

  (Tim Berger / Staff Photographer)