Do the planets revolve on a 2d plane?

  • Context: High School 
  • Thread starter Thread starter j0nis0n
  • Start date Start date
  • Tags Tags
    2d Plane Planets
Click For Summary

Discussion Overview

The discussion centers around the nature of planetary orbits in solar systems, specifically whether planets revolve in a two-dimensional plane or if their orbits can vary significantly in orientation. The scope includes conceptual understanding of orbital mechanics and comparisons to atomic models.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants note that most planets in known solar systems orbit within a narrow plane, typically within 5-10 degrees, although exceptions like Pluto exist.
  • It is proposed that the formation of solar systems leads to a natural tendency for planets to coalesce in a particular plane due to the gas and dust from which they form.
  • One participant mentions that the ecliptic plane can wobble significantly, up to 23 degrees, without causing Newtonian issues.
  • Another participant clarifies that while the ecliptic plane is relatively fixed, the Earth's rotation causes precession and nutation, affecting its orientation over time.
  • There is a suggestion that while rare events could lead to planets orbiting at perpendicular angles, orbital mechanics generally discourage such configurations.
  • A participant acknowledges their understanding of quantum mechanics, noting that electron behavior is described by probabilities rather than fixed paths, drawing a parallel to the discussion of planetary orbits.

Areas of Agreement / Disagreement

Participants express a mix of agreement and differing views on the specifics of orbital mechanics and the nature of planetary orbits, with no consensus reached on the possibility of perpendicular orbits.

Contextual Notes

Some statements rely on assumptions about solar system formation and the behavior of celestial mechanics, which may not be universally applicable across all systems.

j0nis0n
Messages
5
Reaction score
0
(my first post) so i was watching a video on einstein's general theory of relativity when i realized that every solar system diagram shows the planets revolving around the sun on a two dimensional plane. do they really revolve at all the same level of say..a flat zero degrees, or do they actually orbit the sun like the electrons do in a typical picture of an atom? this may be an elementary concept, but i couldn't find the answer on google. thanks for any explanations.

i do plan to take astronomy or astrophysics as a major in college next year. (:
 
Astronomy news on Phys.org
In most systems we know of the planets orbit in a fairly narrow plane - within a few degrees. Most of our Solar System is within about 5-10 degrees though Pluto orbits 17 degrees off the plane.

This is also what we expect to find to the other solar systems we will discover - it is a natural part of solar system formation. The gas and dust that proto-systems form from will tend to coalesce in a particular plane.


BTW, the typical picture of an atom with electrons "orbiting" it is a false one. To understand how electrons are bound to the nucleus Google or Wiki "electron orbitals".
 
Last edited:
The eclipitc plane can wobble a great deal without creating Newtonian problems. In our solar system it wobbles as much as 23 degrees.
 
Chronos said:
The eclipitc plane can wobble a great deal without creating Newtonian problems. In our solar system it wobbles as much as 23 degrees.

The ecliptic plane is more-or-less fixed with respect to some inertial frame. It takes a lot of energy to change the orbital plane. What wobbles is not the orbital plane but the Earth itself. The Earth's rotation about its own axis precesses and nutates with respect to inertial. While the current obliquity of the ecliptic is about 23 degrees, it varies over a long period of time between 22 and 24.5 degrees.
 
Yes but let's not over-complicate the issue and drift from the OP's question. It seems to me he wants to know if we will find systems with planets orbiting perpendicularish to each other.

The answer is: it can happen by certain rare events, but generally orbitral mechanics very strongly discourages it.
 
thanks dave. that's the answer i wanted to hear. now i know the answer and then some more info.
but yes, i know a little about quantum mechanics that electrons are measured by the probability they are in a certain area rather than the path they follow around the atom's nucleus.
 

Similar threads

  • · Replies 19 ·
Replies
19
Views
2K
  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 24 ·
Replies
24
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 21 ·
Replies
21
Views
7K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K