Carl Sagan & Ann Druyan Comet Dual Hand Signed First Edition, First Printing 1985 PSA/DNA. Up for grabs is a beautiful PSA/DNA Certified First Edition Comet in Gem Mint condition hand signed by both Carl Sagan & Ann Druyan! This is a stunning piece and belongs in a science museum.This will sure to be the center piece of any historical autograph and rare book collection. If you have any questions please feel free to message me. The item "Carl Sagan & Ann Druyan COMET Dual Hand Signed PSA/DNA First Edition 1985 GRAIL" is in sale since Saturday, April 02, 2016. This item is in the category "Collectibles\Autographs\Space". The seller is "scottevtv" and is located in Arvada, Colorado. This item can be shipped worldwide.