Does theory of expansion effect gravity?

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The expansion of space does not affect gravity or the size of Earth, as gravity and other fundamental forces dominate at smaller scales. Even if space expands within atoms, the effect is negligible compared to the forces that hold atoms and larger objects together. The expansion of the universe is significant only over vast distances, not within bound systems like Earth. Any minuscule expansion within atoms does not lead to them flying apart, as gravity maintains their integrity. Overall, the expansion of space is too small to have any noticeable impact on objects like Earth.
Shankar Dev
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If space will be expansion then it effect on Earth diameter. If Earth become narrow then how gravity force work ?
 
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The expansion of space does not affect objects which are bound together through gravity or one of the other fundamental forces of nature. The Earth is not affected by expansion.
 
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Yeah but If Space will expansion on both side inner side or outer side then ?
 
I'm sorry but I cannot understand you.
 
the universe has no 'outer' side by definition.
 
Thank you for your Kind reply.
 
I have not much knowledge about physics so can you help me sir ?
 
The space inside of all atoms expands, but it's to such a tiny degree that the forces of nature are far far more powerful and everything acts as it should. If space between an electron and proton expands a tiny tiny bit, it's less than the random motion of the electron anyway, that's why atoms don't fly apart due to expansion and it's the same for larger objects too. If the space inside the Earth expands by a billionth of a micrometer, gravity will keep everything in place. The expansion of space is minuscule, it presents itself only over massive distances. Here is a thought experiment you can do. Imagine a meter stick in your hand. Now imagine a magic force that caused it to expand 5%. It's now 1.05 meters long, a significant amount, but look at each millimeter mark by itself. It's 1.05mm now, not really that big of a deal. Now extrapolate, if the universe expands by light years as a whole, the amount we'd notice it within the tiny little speck that's planet Earth is next to nothing. Everything moves orders of magnitudes faster than the expansion of space except for at the most massive scales.
 
newjerseyrunner said:
The space inside of all atoms expands,

No, it doesn't. Atoms are bound systems. Bound systems do not expand.
 
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