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Carl Sagan - A Tribute to Carl Sagan (Some of the Best Scenes from Cosmos)

Carl Sagan - The Music of the Cosmos Television Series

Carl Sagan "100 Billion Galaxies each W/100 Billion Stars"

Carl Sagan "We Speak for Earth"

Carl Sagan "The Earth as a Fragile Blue Crescent"

Carl Sagan on Tycho Brahe, Johannes Kepler, and ellipses

Carl Sagan on Johannes Kepler's persecution

Carl Sagan on Epicycles, Ptolemy, and Kepler

Carl Sagan on natural laws/constellations

Carl Sagan on the pseudoscience of Astrology

Carl Sagan on the Anasazi peoples' calendrical devices

Ann Druyan talks about the Cosmos mini-series

Carl Sagan on the cosmic Rosetta Stone

Carl Sagan on radio astronomy & the Drake Equation

Carl Sagan on the shape of the cosmos (curved/saddle/flat)

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