Who advocated taking Voyager 1's Pale Blue Dot photograph?

Who advocated taking Voyager 1's Pale Blue Dot photograph? Astronomer and author Carl Sagan advocated taking Voyager 1's Pale Blue Dot photograph.

After Voyager 1 completed its primary encounters with Jupiter and Saturn, Sagan proposed turning the spacecraft's cameras back toward Earth for one final portrait. He recognized that the image would have little scientific value because Earth would appear too small to show surface detail, but believed it could offer a profound perspective on humanity's place in the cosmos.

The photograph was finally taken on February 14, 1990, as part of the Solar System Family Portrait. Mission personnel, including Carolyn Porco and Candy Hansen, helped develop the imaging sequence, while NASA Administrator Richard Truly helped ensure that the plan proceeded.

The image was later popularized through Sagan's 1994 book Pale Blue Dot. Timothy Ferris was a collaborator and science writer, while Edward Stone led the Voyager project, but neither is the canonical answer to who advocated the photograph.