Electron, Atom, Planet, Star: Do All Galaxies Orbit a Single Mass?

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Discussion Overview

The discussion explores the analogy between the orbital relationships of electrons, atoms, planets, stars, and galaxies, specifically questioning whether all galaxies orbit a single greater mass. The scope includes conceptual reasoning and comparisons between atomic and astronomical structures.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that if electrons orbit atoms, and this pattern continues up to galaxies, then all galaxies should orbit a single mass.
  • Another participant counters that while some galaxies are part of clusters that orbit a common center, many galaxies drift through intergalactic space without orbiting anything.
  • It is noted that there is no requirement for a "center" to the universe, challenging the idea that all galaxies must orbit a common center.
  • Some participants clarify that electrons do not orbit in the same manner as astronomical objects, as they exist at various energy levels around the nucleus.
  • Further elaboration on electron behavior includes the probabilistic nature of their positions and speeds due to Heisenberg's uncertainty principle.
  • One participant raises the complexity of galaxy orbits, mentioning the presence of dark matter and the difficulty in concluding the gravitational influences on galaxies.

Areas of Agreement / Disagreement

Participants express differing views on whether all galaxies orbit a single mass, with some asserting that this is not a requirement while others explore the implications of gravitational forces and dark matter.

Contextual Notes

The discussion highlights limitations in understanding the gravitational dynamics of galaxies, particularly regarding the role of dark matter and the lack of a definitive center in the universe.

Destrio
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that if all electrons orbit atoms,
and atoms in the form of moons orbit planets,
and planets orbit stars,
and stars orbit the black hole in the centre of their galaxy,
will all galaxies orbit around a single greater, or greatest mass?
 
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Some galaxies are part of a "cluster" of many galaxies. These in turn orbit a common center.

This is not a requirement. Many galaxies are drifting through intergalactic space, orbiting nothing.

There is no "center" to the universe, and certainly no requirement that all galaxies shall orbit a common center.

Lastly, electrons orbiting the nucleus of an atom has nothing to do with gravity.
 
Electrons don't orbit in the same sense that astronomical objects do. Electrons are at various energy levels in the neighborhood of the nucleus.
 
mathman said:
Electrons don't orbit in the same sense that astronomical objects do. Electrons are at various energy levels in the neighborhood of the nucleus.

True, and these energy levels are really just points in space around the nucleus where there is a high probability of finding an electron. Also, the electrons also differ in that their position and speed may never be determined simultaneously due to Heisenberg's uncertainty principle.

As for the galaxies orbiting a common senter of gravity, it is actually a bit hard to conclude on this as there seems to be a lot more (dark) matter in the universe than what is accounted for at the present, so some galaxies and stars seem to be orbiting some mass excerting gravitational force, though this mass has not yet been found.
 

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