why small bodies revolve around lage bodies?

Question

You have seen ,moon revolves around earth, earth revolves around sun , sun revolves around galactic center...... WHY?
What is the science behind this...?

Answer 1

They revolve around each other, really, it is relative, but the larger body has a greater gravitational pull, so it is what dominates.

Answer 2

It's not the size, actually, it's the mass. We don't have any examples of this in our solar system, so it appears the small object always revolves around the big object. (OK, to be more accurate, the objects revolve around the center of gravity for the system. However, if one object is much more massive, the center of gravity will be inside the more massive object, so it will appear that the smaller object is doing most of the moving.)

However, this doesn't mean it can't happen. For example, if our sun were a neutron star, it would be roughly the size of Earth but extremely dense. Assuming the sun had the same mass as our current sun, the planets would still revolve around it the way they do now.

Answer 3

One importatn point that some forgot is that greater mass does not necessarily mean greater size. eg: you friendly neighbourhood blackhole. Objects with lesser force will revolve around objects with greater force, be it gravity, electromagnetism, or nuclear forces. Revolving around larger bodies starts right from the nucleus of the atom. The motion is actually a straight line. The smaller body falls towards the larger body. Since the distance of the smaller body is greater than a specified limit, (i wil not go into the details...) it misses the greater body and zooms past and the falling process begings all over again. This is a bit difficult to imagine. To answer may b one of your next question, if we are always falling, will earth ever fall into the sun? yes it might but you or me or not even over next thousand generations will be here to see it.

Answer 4

A moon is a small celestial body that moves around a planet. Planets and their moons: Earth 1 Mercury 0 Venus 0 Mars 2 Jupiter 63 Saturn 60 Uranus 27 Neptune 13 Pluto 3 (Dwarf Planet)

Answer 5

All maters have gravity . That is why the great mass of mater , be it gas or solid or whatever , has gravity in proportion to its mass . Great mass has great force of gravity and its field extends to distances around it and it diminishes in its strenth in inverse proprtion to the distance by a square of the distnce .Since larger bodies a have a larger mass and consequentlky a greater force of attraction that the smaller on's , the smaller ones naturally revolve round the larger ones. Just a magnet can lift a pin and a pin can not lift a magnet heavier than itself , the larger bodies can not me moved by the smaller bodies. Since all bodies ofmasss in the space are inmovement and since the gravity pu;lls the bodies around it towards its centere and the movement of thebodies that are attracted are at a tangent to the force of gravity , the smaller bodies continues to move along the direction of the resultant force which is in equilibrium with the two forcesof gravity and the motioin of the smaller body.and this happens to be a path around the bigere body and this enables the smaller body to go around the bigger one without having to hit or fall on it
All mattee should have this force of araction right from the stage of an atom. As the atoms of various elements accrue and by accretion larger masses form the foces of attraction get concentrated at the center of the mass as all the atoms as they accrete exert equal force ofattraction all around them and pull and keep the adjacent atoms together always pulling to the center of the mass . That is why all substances in nature have a tendency to form a round shape as the mass made of the atoms that hold themselves togethre into a mass exert a pull all around them in equal measure. So the outside surgace naturally experience a uniform foce only in the case of a round shaoe and all other shapes will have different strenght of force atdifferent points on the surface . But a globe would experience the same amount of attraction on any and every point on its surface .
just as a liter of grains make a noise when droped to the floor and as a smaller quantity would make a smaller sound in prorportion and a still smaller quantity would make a still smaller sound and thus even a single grainwould be making a sound while falling down though we migh not be able to hear it . The sameway the atoms too have thier gravity in proportion to thier mass and it is the accrual of this mass to enaormous proportioin that exhibits in the greatest foce of gravity that we experience on the earth and in the space among the great mases of planets and stars.

Answer 6

Because gravity bends spacetime around objects, and it bends spacetime more if the body is larger :P
No, I'll leave Einstein for now, but well... gravity. One of the basic forces of the universe. I hope you don't expect me to explain gravity, since I have no idea what it is or how it works (I don't think even physicists really do...), but its rules are fairly well known and, I presume, taught in high school. They (the Newtonian versions) are definitely taught in Hungarian high schools at least.

Actually when two bodies are attracted to each other with sufficient force, they both revolve around the centre of gravity of the whole system, but where the masses are very unequal, the c.o.g. is inside the larger body, so it seems as if the smaller orbited the larger object. I recall having read that in the case of Pluto and Charon, the two bodies are so similar in mass that the system's centre of gravity lies somewhere between the two, and both of them perform a strange dance around this point in space.

Answer 7

Every body has gravitational full.
Usually, greater the body greater its gravitational full.
If the earth had more gravitational full as compared to the the sun would revolve around the earth.
Understood Prof. Saad

Answer 8

The greater the mass, the greater distortion of time and space. The inertial energy, of our planet for instance, was first set in motion during the initial formation of the solar system. The balance between the Sun's gravity and our intertial energy keeps us in orbit. If, for example our inertial energy was larger than what it is now, we'd go flying off into space, or if the sun's gravity was greater than our intertial energy, we'd go falling into the sun. As it is, we're in balance.

Answer 9

The sun is the centre. Small bodies were formed from large bodies, the big bang. If there were larger bodies it would have already crushed the smaller ones.

Answer 10

No one mentioned that centrifugal force is just as important a factor as gravity, or what is the name of a law that means that a body in motion will stay in motion unless acted upon by another force? Without both gravity and an opposing force, orbiting would be impossible.

Answer 11

Larger bodies have more mass and smaller bodies have less mass. A large mass has strong gravity and a small mass has weak gravity. A large mass has large inertia and a small mass has small inertia. Inertia is the resistance to being moved. So large masses are hard to move and have strong gravity to control the smaller, more easily moved, masses.