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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 .
Because Pluto did not fit the last of these requirements, after years of debate it was "demoted" to the status of a dwarf planet by a majority vote of the International Astronomical Union at its ...
Pluto's planetary status was and is fondly thought of by many, especially in the United States since Pluto was found by American astronomer Clyde Tombaugh, and the general public could have been alienated from professional astronomers; there was considerable uproar when the media last suggested, in 1999, that Pluto might be demoted, which was a ...
Reviews of the book have been generally positive, with James Kennedy of The Wall Street Journal calling the book a "brisk" and "enjoyable ... chronicle" of the tale of the search for new planets and the eventual demotion of Pluto from planetary status. [3] Janet Maslin of The New York Times called it a "short, eager-to-please research memoir". [4]
Pluto was considered a planet up until 2006, when researchers at the International Astronomical Union voted to "demote" it to dwarf planet. Pluto was considered a planet up until 2006, when ...
For 76 years, Pluto was considered our solar system's ninth planet — so, what caused it to lose its status?
Particularly notable are Eris, a dwarf planet and the only TNO known to be more massive than Pluto, leading directly to Pluto's demotion from planet status; [2] [8] Sedna, a planetoid thought to be the first observed body of the inner Öpik–Oort cloud; and Orcus.
In 2006, after New Horizons was launched but before it could complete its nine-plus year journey, Pluto suffered the indignity of being demoted from planet to dwarf planet by the International ...