tenth planet

[turin]

Does anyone know anything about a tenth planet (a planet that orbits outside of pluto's and neptune's orbits) that was discovered a few months ago?

[chroot]

Sedna?

http://www.gps.caltech.edu/~mbrown/sedna/

- Warren

[Entropy]

Man, they should have stuck with Roman names. Save the other pantheons for other systems.

[styler]

Sedna, of course, re-opens the controversy of what consitutes a planet.
Some would argue that charon should be a planet. Others would say that Pluto doesn't count as one at all.
sedna, pluto ..... (http://www.kuro5hin.org/story/2004/3/15/0514/53796)

[pnjabiloafer]

they were planning on dividing planets into two different categories. One would be planets, whihc is large bodies of mass circling the sun. THe other catergory would be planetoids (combination of the word planet and asteroid). These planetoids would be small in their size but are circling the sun, and nevertheless a part of our solar system.

[Phobos]

turin - Note that Sedna is not considered a planet. Looks like it has yet to be classified.
http://www.nineplanets.org/sedna.html

[turin]

Thanks, all. The issue has been fully resolved to my personal satisfaction (which, incidently, was not at all stringent this time).