The Carl Sagan Portal
Home of Carl Sagan Productions, the portal features a blog by Ann Druyan, information about the Carl Sagan Foundation, and other updates about the planetary sciences.
Carl Sagan - Wikipedia
Article about Carl Edward Sagan, the American astronomer, astrobiologist, and highly successful science popularizer.
Online memorial for Dr. Carl Sagan, the astronomer, educator, author, pioneer in exobiology, Director for Planetary Studies, and David Duncan Professor of Cornell University.
Celebrating Sagan is a nonprofit blog working to build a living memorial to remember the life of Dr. Carl Sagan.