William Sanford "Bill" Nye, popularly known as Bill Nye the Science Guy, is an American science educator, television presenter, and mechanical engineer. Scientist, comedian, teacher, and author, Bill Nye is best known as the host of the PBS children's science show Bill Nye the Science Guy (1993–1998), and for his many subsequent appearances in popular media as a science educator.

Currently, Nye is The Planetary Society’s CEO. It’s the world’s largest non-profit space interest group with members in 130 countries. Cofounded by Carl Sagan, Bruce Murray and Louis Friedman, the organization’s mission is to empower the world’s citizens to advance space science and exploration. Nye joined The Planetary Society as a Charter Member in 1980. Nye’s engineering and management experience enabled him to take the lead and play a hands-on role in making programs like LightSail® a success.