Mars astronauts

Broadcast 1097 (Special Edition)

Guest: Dr. Neil DeGrasse Tyson. Topics: Pluto, planets, Disney, Kuiper belt, terrestrial planets, gas giants, NASA, human spaceflight, geopolitical drivers. Dr. Tyson returned to The Space Show to discuss his new book, "The Pluto Files: The Rise and Fall of America's Favorite Planet," which details the reclassification of Pluto from a planet to a dwarf planet. Dr. Tyson explains why this change was made and what the IAU action really means. You may be surprised to learn the decision is not binding! In the discussion, Dr.

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