A celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its ...  The dwarf planet Pluto is recognised as an important prototype of a new class ...  Q: Based on this new definition, how many planets are there in our Solar System ? .... B5 a dwarf planet can not be a satellite, even if they are massive enough that  ...
The International Astronomical Union (IAU) downgraded the status of Pluto ...  inner Solar System and the gas giants of the outer system will be designated ...  So now we have eight planets instead of the nine we used to have. What is a  Dwarf Planet? A “dwarf planet,” as defined by the IAU, is a celestial body in direct  orbit of ...
Jul 13, 2015 ... But in 2006, it was relegated to the status of dwarf planet by the International  Astronomical Union (IAU). So why was Pluto demoted?
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt , a ring of ... That definition excluded Pluto and reclassified it as a dwarf planet. ...  Light from the Sun takes about 5.5 hours to reach Pluto at its average ..... known  Pluto as a planet and will continue to do so regardless of the IAU decision. In ...
Jan 5, 2012 ... Since its discovery, astronomers have determined that Eris' size is ... Then our  Solar System would have 9 planets again. Even though Pluto is a dwarf planet,  and no longer officially a planet, it'll still be a ... The first discusses the IAU's  decision, and the second is about Pluto and the ... Location is another.
By declaring that Pluto was no longer a planet, the (International Astronomical Union) put into place a planetary definition that would have even declassified Earth as a planet if it existed as far from the sun as Pluto does.