Hi fellows... Have you heard anything about Hubbles law (the law states that universe is expanding) and gravitational law (every object is attracting other towards itself with a particular force) ...??? If yes then i want to discuess a predicament if u can contrive.. dont you think these laws are contradictory to each other...??????

AOA,
I am interested in this discourse.Let me share this text.
Expanding Universe
The galaxies we see in all directions are moving away from the Earth, as evidenced by their red shifts. Hubble's law describes this expansion.



The fact that we see all other galaxies moving away from us does not imply that we are the center of the universe! All galaxies will see all other stars moving away from them in an expanding universe. A rising loaf of raisin bread is a good visual model: each raisin will see all other raisins moving away from it as the loaf expands.

The fact that the universe is expanding then raises the question "Will it always expand?" Since the action of gravity works against the expansion, then if the density were large enough, the expansion would stop and the universe would collapse in a "big crunch". This is called a closed universe. If the density were small enough, the expansion would continue forever (an open universe). At a certain precise critical density, the universe would asymtotically approach zero expansion rate, but never collapse. Remarkably, all evidence indicates that the universe is very close to that critical density. Discussions about the expansion of the universe often refer to a density parameter Ω which is the density divided by the critical density, such that Ω = 1 represents the critical density condition

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Hubble's Law

A law of cosmology stating that the rate at which astronomical objects in the universe move apart from each other is proportional to their distance from each other. Current estimates of the value of this proportion, known as Hubble's constant, put its value at approximately 71 kilometers per second per megaparsec.


Newton's law of gravitation

The principle that expresses the force of gravitational attraction between two bodies as a function of their mass and their distance. Expressed mathematically, F = Gm1m2/d2 where F is the force in Newtons, m1 and m2 are the masses of the bodies in kilograms, G is the gravitational constant, and d is the distance between the bodies in meters. Newton's Principle of Gravitation is an example of an inverse square law. Also called law of gravitation, law of universal gravitation.

Dear brother!
The two laws are not contradictory.
1- The Universe is expanding.
2- Every object is attracting every other object.

The expansion of universe proves that the gravitational force is insufficient to stop the expansion, but it exists.
And, accoding to this very law of gravitation, the farther the objects are the weaker the force exists among them. So the rate of expansion of universe will keep increasing for ever.

I shall also disagree to Mr. Khattak on the point that the universe will achieve its maximum expansion at certain point of time. We have nothing to prove or even hypothesize that. Because the available laws of motion, inertia and gravitation suggest expansion of universe should be ever increaing and never ending.