Does Local Gravity Override Dark Matter in Galactic Rotation?

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SUMMARY

The discussion centers on the influence of local gravitational effects on the rotation of stars at the edges of galaxies, challenging the traditional view of dark matter. Participants debated whether nearby stars could alter their rotational speeds due to mutual gravitational interactions, similar to the Earth-Moon system. The consensus is that while local gravity affects individual star orbits, it does not change the overall orbital velocity dictated by the galaxy's mass distribution. The conversation highlights the complexity of gravitational interactions in galactic dynamics and the stability of mass distribution in galaxies.

PREREQUISITES
  • Understanding of gravitational dynamics in astrophysics
  • Familiarity with the three-body problem in celestial mechanics
  • Knowledge of galactic mass distribution and its effects on rotation curves
  • Basic principles of orbital mechanics and Kepler's laws
NEXT STEPS
  • Research "galactic rotation curves and dark matter" for deeper insights
  • Study "the three-body problem" and its implications in astrophysics
  • Explore "numerical simulations in celestial mechanics" for modeling gravitational interactions
  • Investigate "mass distribution in galaxies" and its effects on star orbits
USEFUL FOR

Astronomers, astrophysicists, and students of celestial mechanics interested in understanding the dynamics of galaxies and the implications of gravitational interactions on star rotation.

  • #31
weirdoguy said:
Is anyone saying that string theory is empirically verified? No. So what's your point? Besides, this thread is about plain old classical gravity. Physicists may be wrong when it comes to untested models like string "theories", but gravity - Newtionian and Einsteinian - has been tested and observationally verified on so many levels that putting it's validity in doubt is very unreasonable, to say the least.
OK. More to the point what empirical evidence is there for "dark matter"?
 
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  • #32
This has nothing to do with this thread, so start your own with this question. Or search for other threads about this issue, because it has been discussed here multiple times.
 
  • #33
weirdoguy said:
This has nothing to do with this thread, so start your own with this question. Or search for threads for other threads about this issue, because it has been discussed here multiple times.
 
  • #34
Ibix said:
...the general problem with advancing science isn't coming up with new ideas. It's coming up with new ideas that aren't obviously wrong to anyone who knows anything about the topic.
:oldbiggrin:
 
  • #35
Viopia said:
OK. More to the point what empirical evidence is there for "dark matter"?
It's a pity you're banned, and that this is off-topic. Else I would have you look up the Bullet Cluster.
 
  • #36
The thread topic has been sufficiently discussed. Thread closed.
 

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