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Clyde William Tombaugh / ˈtɒmbaʊ / (February 4, 1906 – January 17, 1997) was an American astronomer. He discovered the ninth planet Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt. At the time of discovery, Pluto was considered a planet, but was reclassified as a dwarf planet in 2006.
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is less massive than Eris.
The Pluto Files: The Rise and Fall of America's Favorite Planet is a book written by the astrophysicist and Hayden Planetarium director Neil deGrasse Tyson. The book is about Pluto , which was demoted to the status of dwarf planet in August 2006 by the International Astronomical Union , thereby depriving it of its planet-hood. [ 1 ]
How I Killed Pluto and Why It Had It Comingis the 2010 memoir by Mike Brown, the American astronomermost responsible for the reclassificationof Plutofrom planetto dwarf planet. [1][2] Summary. [edit] The memoir is an account of the events surrounding the redefinition of the term planetthat eventually changed the status of Pluto.
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written into it.) Janet reads through the book as they pass the outer planets and until they pass Pluto, leaving the solar system. When the class got to Pluto, the Sun (because Pluto is far away from the Sun) didn't look big anymore but it was a small yellow star. Janet then flips through the book and finds the instructions for the autopilot ...
The distinction between astrology and astronomy was not entirely clear. Advances in astronomy were often motivated by the desire to improve the accuracy of astrology. [77] Kepler, for example, was driven by a belief in harmonies between Earthly and celestial affairs, yet he disparaged the activities of most astrologers as "evil-smelling dung". [78]
Moons of Pluto. The dwarf planet Pluto has five natural satellites. [ 1] In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and Hydra. [ 2] Charon, the largest, is mutually tidally locked with Pluto, and is massive enough that Pluto and Charon are sometimes considered a binary dwarf planet.
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