Originally posted by Rapacity
Maybe these will help:
Most Distant Object in Solar System Discovered
NASA-funded researchers have discovered the most distant object orbiting Earth's Sun. The object is a mysterious planet-like body three times farther
from Earth than Pluto.
Astronomers Find A Second Pluto
Rapacity --
The link you provided about the "second Pluto" is an article about Sedna -- a body discovered in 2002 and is almost the size of Pluto. The same
team that discovered Sedna also announed the discovery of "Eris" in 2005.
When Eris was discovered, some thought it should be the "10th Planet" because it is actually larger than Pluto and even has its own moon. However,
instead it triggered the debate as to what should be called a planet. Eris was indirectly resposible for the re-catagorization of Pluto as a "Dwarf
Planet" in 2006. Eris, along with Sedna, also fell under the Dwarf Planet catagory.
The fact that there is another planet-like body in our solar system isn't really surprising. We have 8 known Planets and many more Dwarf Planets.
Scientists are fairly certain that bodies larger than Eris and Pluto still exist out there, but remain undiscovered. Japanese scientists announced
last month that they have proved the existence (through calculations) of another large body in our solar system, but have not yet found it.
I'm sure that in time, scientists will discover dozens, if not hundreds, of large (maybe planet-sized??) rocky bodies out past the orbit of Neptune
(called trans-Neptunian objects) in the Oort cloud and Kuiper belt.
Here's info on Eris and Sedna:
Eris Wikipedia
Sedna Wikipedia
[edit on 5/16/2008 by Soylent Green Is People]