In the interview, Dr. Tyson states that Pluto is a dwarf planet, not a planet, based on the scientific definition of a planet. He explains that Pluto fails to meet the criteria for a planet, which includes having cleared its orbit of other objects.
While he doesn't explicitly state a favorite planet, Dr. Tyson's passion for astronomy and his enthusiasm for the scientific process suggest a deep appreciation for all celestial bodies, including Pluto, even though it's not classified as a planet.
