Pluto has been “demoted” to the status of a dwarf planet as it does not meet the following criteria for being a planet: – it must be in orbit around the Sun – its orbit must be large enough that it takes on a nearly round shape – however, Pluto’s orbit around the sun is elliptical) – it has cleared its orbit of other objects. However, Pluto resides in an area of space populated by other celestial objects) Sources: Http://nasm.si.edu. National Air and Space Museum
Please refer to the posting entitled,”What Is A Planet?” www.nasm.si.edu/research/ceps/etp/pluto/pluto_planet.html (Last accessed on 2nd July 2011)
Books Recommendation on Pluto:
Title: Pluto : a dwarf planet
Author: Vogt, Gregory.
Publisher: Minneapolis, Minn. : Lerner Publications, c2010.
Call number: J 523.49 VOG
Title: When is a planet not a planet? : the story of Pluto
Author: Scott, Elaine, 1940-
Publisher: New York, N.Y. : Clarion Books, c2007.
Call number: J 523.48 SCO
Title: The dwarf planet Pluto Author: Lew, Kristi.
Publisher: Tarrytown, N.Y. : Marshall Cavendish Benchmark, c2010 Call number: J 523.49 LEW
Posted by Kweh Soon Huat, Librarian, Adults and Young People’s Services