File:Planetary society.jpg

DescriptionPlanetary society.jpg English: Carl Sagan, Bruce Murray (seated right to left) and (standing) Louis Friedman (standing, right), the founders

of humanity, Springer Retrieved on 30 September 2009. ISBN: 9783540439882. Asteroid 1 Ceres. The Planetary Society. Retrieved on 2009-09-30. English

DescriptionCarl Sagan Planetary Society.JPG English: Part of Image:Planetary society.jpg Original caption: "Founding of the Planetary Society Carl Sagan, Bruce

nebulae discovered by George Abell in 1966, is a beautiful example of a planetary nebula. determination method: SHA-1 described at URL: https://noirlab

DescriptionCarl Sagan Planetary Society (cropped).JPG English: Part of Image:Planetary society.jpg Original caption: "Founding of the Planetary Society Carl Sagan