Does Newton's Law of Gravitation Apply in Outer Space?

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Discussion Overview

The discussion centers on the applicability of Newton's Law of Gravitation in outer space, particularly whether gravitational attraction occurs beyond the immediate vicinity of massive bodies. Participants explore the nature of gravitational influence and its reach in the context of celestial mechanics.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that gravitational attraction only occurs "within the region of gravity of a matter," implying a limitation to gravitational influence in space.
  • Another participant counters that gravity is responsible for maintaining the orbits of celestial bodies, indicating that gravitational forces extend into space.
  • Questions arise about the meaning of "region of gravity," with participants seeking clarification on whether gravitational attraction ceases at a certain distance.
  • A later reply asserts that the Newtonian gravitational field extends out to infinity, suggesting that gravitational influence is not limited by distance.

Areas of Agreement / Disagreement

Participants express differing views on the extent of gravitational influence, with no consensus reached regarding the limitations of Newton's Law of Gravitation in outer space.

Contextual Notes

Participants discuss the implications of distance on gravitational force, noting that while the force diminishes with increasing distance, it is unclear whether this leads to a complete cessation of gravitational attraction beyond a certain point.

arunborah
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Hello

I studied about the Newton law of Gravitation which states that in universe every matter attract each other with a force which is denoted by F= Gm1m2/r^2. But in my view it is only happen within the region of gravity of a matter. but not in the space.

please can anybody help me in this regard?
 
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arunborah said:
But in my view it is only happen within the region of gravity of a matter. but not in the space.
What do you mean by "within the region of gravity of a matter"?

Gravity is what keeps the Moon in orbit about the Earth, the planets in orbit about the Sun, the stars in orbit about the galaxy, our galaxy bound to the local group. Gravitation extends into space.
 
arunborah said:
I studied about the Newton law of Gravitation which states that in universe every matter attract each other with a force which is denoted by F= Gm1m2/r^2.
OK.

But in my view it is only happen within the region of gravity of a matter. but not in the space.
What do you mean by that? Are you saying that two masses separated by space will not attract? What is the "region of gravity"?
 
arunborah said:
Hello

I studied about the Newton law of Gravitation which states that in universe every matter attract each other with a force which is denoted by F= Gm1m2/r^2. But in my view it is only happen within the region of gravity of a matter. but not in the space.

please can anybody help me in this regard?
Do you think gravity only acts within the atmosphere(region?) and not exceeds to space(which is what we call to place beyond the earth)?Do you think in terms of earth?
I think he is talking about this: As distance increase the gravity force decrease.
By that,do you think that the gravity force gets vanished beyond "The region"?
 
The Newtonian gravitational field ##F = -\frac{GM}{r^{2}}\hat{r}## extends out to infinity isotropically.
 

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