Mysterious 10th Planet Discovered Beyond Pluto

  • Thread starter Thread starter turin
  • Start date Start date
  • Tags Tags
    Planet Pluto
Click For Summary

Discussion Overview

The discussion revolves around the discovery of a potential tenth planet beyond Pluto, specifically focusing on the object known as Sedna and the implications of its classification within the solar system. The conversation touches on the definitions of planets and planetoids, as well as the historical context of planetary naming conventions.

Discussion Character

  • Debate/contested, Conceptual clarification, Exploratory

Main Points Raised

  • Some participants inquire about the discovery of a tenth planet beyond Pluto and Neptune.
  • One participant mentions Sedna as a candidate for this classification and provides a link for further information.
  • Another participant expresses a preference for using Roman names for planets, suggesting a naming convention debate.
  • There is a discussion about the classification of celestial bodies, with some arguing that Sedna and Charon could be considered planets, while others assert that Pluto should not be classified as one.
  • A proposal is mentioned regarding the division of celestial bodies into two categories: planets and planetoids, with the latter being smaller bodies orbiting the sun.
  • A participant notes that Sedna is not currently classified as a planet and refers to an external source for clarification.
  • One participant claims to have resolved the issue to their personal satisfaction, indicating a subjective conclusion rather than a consensus.

Areas of Agreement / Disagreement

The discussion reflects multiple competing views regarding the classification of Sedna and the definitions of planets versus planetoids. There is no consensus on these issues, and participants express differing opinions on what constitutes a planet.

Contextual Notes

Limitations in the discussion include unresolved definitions of what constitutes a planet, the status of Sedna's classification, and the implications of historical naming conventions.

turin
Homework Helper
Messages
2,314
Reaction score
3
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?
 
Astronomy news on Phys.org
Man, they should have stuck with Roman names. Save the other pantheons for other systems.
 
8,9,10, 11 planets

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

Similar threads

High School Is the barycentre of the Pluto - Charon system also the L1 point?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad New Developments In The Search For Planet X
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad How Big of an Object Orbiting Closer to the Sun Than Earth Could Be Overlooked?
  • · Replies 17 ·
Replies
17
Views
4K
Old Astronomy Book Predicts the Kuiper Belt
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Is Pluto a Collisional Family? Examining its Unique Orbit and Recent Moons
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Evidence for existence of a 9th Planet in the solar system
  • · Replies 15 ·
Replies
15
Views
3K
Stargazing [just for fun] Planet Definition
  • · Replies 2 ·
Replies
2
Views
2K
High School Saturn's 145 Moons: The Latest Discoveries and What Sets Them Apart
  • · Replies 16 ·
Replies
16
Views
5K
High School Help with the protocol for accurately recording an orbit for the IAU
  • · Replies 0 ·
Replies
0
Views
1K
High School Newly Discovered Trans-Neptunian Dwarf Planet
  • · Replies 11 ·
Replies
11
Views
3K