Even if its in the smallest scales. Are they?
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Yes, they are. gravitationally attracted - but only by a very tiny bit.
If the two planets are Earth-sized, and the distance is 93 billion light years, then the gravitational force is 3.08 x 10^-15 newtons. That's very small, but it's not zero. It's enough to move the planets about 48 micrometers in 13.75 billion years (the age of the universe).
It would take 1975 billion years for the planets to move 1 meter. and 5.86 million billion billion years to move 1% closer.
If the two planets are Earth-sized, and the distance is 93 billion light years, then the gravitational force is 3.08 x 10^-15 newtons. That's very small, but it's not zero. It's enough to move the planets about 48 micrometers in 13.75 billion years (the age of the universe).
It would take 1975 billion years for the planets to move 1 meter. and 5.86 million billion billion years to move 1% closer.
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I think there is no edge of universe. Each and every masses have their force of attraction but in such case due to the relation (f= Gmm/d^2) . when the distance increases very much the distance d becomes infinite and the product of masses (mm) is constant . if we divide constant by infinity it become zero so the force of attraction between them is zero.
many thanks
many thanks
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Yes.
Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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Yes, they are mutually attracted. Gravity propogates at or extremely close to the speed of light and has infinite range. If the two planets were alone in the universe, they would eventually come together (the accelerating expansion of the universe notwithstanding!)
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The universe has no edges and gravity propagates with lightspeed .... The attraction would theoretically be there but too small to measure, notice or be taken into account.
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Well considering that all the matter in the known universe would be in between them no. However, if they were the only two objects in the universe then theoretically yes.
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Yup, just as love, even on the smallest case people are attracted by one-another.
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unless one or both of the planets have a really high magnetic field, they are not gravitationally attracted.