The Planetary Society (1980 - Present) is an American non-governmental nonprofit foundation involved in research, public outreach, and political advocacy for engineering project relating to the fields of astronomy, planetary science, and space exploration. Founded in 1980 by Carl Sagan, Bruce Murray, and Louis Friedman, the Planetary Society counts over 50,000 members in more than 100 countries worldwide. The Society states its mission as 'To empower the world's citizens to advance space science and exploration.'