carl sagan

April 5, 2016

The Pale Blue Dot – The Sagan Series

As the spacecraft Voyager 1 on February 14, 1990 left our planetary neighborhood for the fringes of the solar system, engineers turned it around for one […]
November 12, 1994

Nuclear War: The Perspectives of a Planetary Astronomer

http://www.wagingpeace.org/articles/wagingpeaceseries/sagan.pdf