Pluto was the 9th and final planet to be discovered, in February 18, 1930. Clyde W. ...
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- By definition from a Merriam- Webster Dictionary a planet is “any of the large bodies that revolve around the sun in the solar system which have a similar body to them”. This is not a very specific explanation and makes it hard to fully grasp what it means; at this you could easily say that in fact Pluto a planet. However if you look at a scientific encyclopedia the definition is much different and more specific. The Access Science Encyclopedia says a planet is “A) a celestial body that is in orbit around the sun B) has sufficient mass for its self-gravity to overcome rigid body forces so that it can assume a hydrostatic equilibrium shape C) clears the neighborhood around its orbit”.... [tags: solar system, size, sun, IAU, astronomy, orbit]
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- ... Because once the object is large enough to have a stronger gravitational field then it is not a dwarf planet anymore. Generally, most of the known dwarf planets have masses smaller than that of Mercury’s. The lower limit is determined by the requirements of achieving a hydrostatic equilibrium shape. Hydrostatic equilibrium is the current distinguishing criteria between dwarf planets and other Go 3 small bodies. A hydrostatic equilibrium shape means the object is symmetrically rounded into a spherical or elliptical shape.... [tags: astronomy, Ceres, Pluto]
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- The Demotion of Pluto from Planetary Status “Pluto has been voted off the island” (Inman). In August of 2006 the celestial body was officially retitled a dwarf planet. The media’s portrayal of the demotion of Pluto began in 2006 and covered a broad variety of topics including the official ruling in Prague, the public’s reception of the decision, a book written by a scientist claiming sole responsibility for the demotion, and finally NASA’s most recent statement in 2012 regarding the dwarf planet.... [tags: astronomers, plutoid, guidelines]
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