Is Gravitomagnetism attractive does it have important long range attraction?

In summary, gravitomagnetism is a weak effect that is not strong enough to explain MOND or dark matter. Its effects on the path and rotation of objects are ambiguous and difficult to measure accurately.
  • #1
ensabah6
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Gravity is important over long ranges as it is always attractive.

Gravity has an analogue to magnetism called gravitomagnetism.

Is it always attractive?

Could "dark matter" or MOND be explained as gravitomagnetism?

i.e if gravitomagnetism is always attractive and additive, what is its strength galaxy-side
 
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  • #3
ensabah6 said:
Gravity is important over long ranges as it is always attractive.

Gravity has an analogue to magnetism called gravitomagnetism.

Is it always attractive?

Could "dark matter" or MOND be explained as gravitomagnetism?

i.e if gravitomagnetism is always attractive and additive, what is its strength galaxy-side

Gravitomagnetism is extremely weak. As could be guessed from the analogy with electromagnetism, the strength of a gravitomagnetic source moving at speed v is of the order of v/c times its usual gravitational field, and the strength of the acceleration effect on an object moving at speed V is of the order of V/c times the effect of the usual gravitational field, so overall the effect is of order vV/c2 smaller than that of the usual gravitational field.

This is much too weak to explain MOND effects, where the acceleration of stars at the edge of a galaxy appears to be significantly greater than the usual gravitational field.

The effects of gravitomagnetism on the path of an object are somewhat ambiguous anyway, as there are other effects of the same order due to the curvature of space which may or may not be considered part of "gravitomagnetism" depending on the point of view.

The effects of gravitomagnetism on rotation are more distinct, in that a body in the vicinity of a massive rotating body experiences tiny rotational effects, such that when local tests appear to show no rotation, there is a very slight rotation relative to the fixed stars, or vice versa. This effect was being investigated by Gravity Probe B, which gave results reasonably consistent with theory but unfortunately failed to achieve the expected accuracy because of unexpected effects of residual charge in the experimental apparatus.
 

1. Is Gravitomagnetism the same as regular magnetism?

No, Gravitomagnetism is a concept in theoretical physics that describes the effects of gravity on moving objects, while regular magnetism refers to the force between magnetic objects. They are two different phenomena and operate under different laws.

2. Does Gravitomagnetism have an attractive force?

Yes, Gravitomagnetism can have an attractive force on objects with mass. This is due to the curvature of spacetime caused by massive objects, which can attract other objects towards it.

3. Is Gravitomagnetism a long-range force?

Yes, Gravitomagnetism is considered a long-range force because it can act over vast distances. However, its strength decreases with distance, following the inverse-square law, meaning it becomes weaker the farther away the objects are from each other.

4. How does Gravitomagnetism affect the motion of objects?

Gravitomagnetism can affect the motion of objects by altering their trajectory or acceleration. This is due to the gravitational pull of massive objects, which can cause other objects to orbit or fall towards them.

5. Is Gravitomagnetism important in our daily lives?

No, Gravitomagnetism is a concept that is mainly studied in theoretical physics and is not directly relevant to our daily lives. However, it plays a significant role in understanding the behavior of celestial bodies in the universe.

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