from astronomers. The IAU has stated that there are eight known planets in the Solar System. It has been argued that the definition is problematic because...

Source: "IAU 2006 General Assembly: Resolutions 5 and 6" (PDF). IAU. August 24, 2006. Retrieved June 23, 2009. The definition of the term planet has changed...

Charon be reclassified as a double planet, but the proposal was abandoned in favor of the current IAU definition of planet. Other trans-Neptunian systems...

formal definition of a planet that was proposed by the International Astronomical Union (IAU) in August 2006. According to IAU definition of planet, a planet...

the IAU. Alan Stern, the director of NASA's mission to Pluto, rejects the current IAU definition of planet, both in terms of defining dwarf planets as...

A pluton is a body of intrusive igneous rock. Pluton may also refer to: A proposed IAU definition of planet rejected in favour of plutoid French ship...

System. Under the IAU definition, true or "major planets" can be distinguished from other planetary-mass objects (PMOs), such as dwarf planets and sub-brown...

are eight official planets in the Solar System per the International Astronomical Union (IAU), which has also established a definition for exoplanets. Several...

number of dwarf planets may be much lower, perhaps only eight among bodies known so far. The International Astronomical Union (IAU) defines dwarf planets as...

exotic forms of life. Although there are many icy objects in the Solar System, none of them qualify as planets under the IAU definition of planet. However...