Well for us humans that most probably wont ever leave the Earth then gravity is always here and (very nearly) always constant. BUT it isn't constant, gravity is proportional to 1/r^2, where r is the radius from the centre of the Earth (or object). As you can see from this if you get further away from the centre of the earth then gravity diminishes, ie if you are on top of a tall building then gravity will be less than if you where on the ground, therefore gravity is not always constant but unfortunately it only varies by very small amounts and therefore isn't noticeable to us.Now to fully answer your question, YES gravity is always there, even if you where very very far away gravity will still have an affect on you, it is just such a small affect you wouldn't feel it. Even if you where in the middle of space then you may think there is no gravity but actually gravity is an infinite force and so is always there.
gravity will always be the same it is always stronger than objects but it will never change.
No, the gravity between Jupiter and its moons acts towards the centre of Jupiter.
Gravity
No. For example, a ring has a center of gravity in the center of the ring, not on any part of the ring.
Gravity was always there. Just after the big bang, and even before the big bang, gravity existed.
Gravity is there always.
always has been... Always will be
no, there is always gravity
Earth will always have gravity for gravity is a result of mass.
gravity will always be the same it is always stronger than objects but it will never change.
Yes. The moon has gravity and always has.
No, gravity has always (and always will) been here Here is the link if you meant who discovered gravity! :)http://wiki.answers.com/Q/Who_discovered_gravity .Hope this helps!
Gravity does not have a 'charge'. It is, however, always attractive and never repulsive.
Yes. Gravity always works.
Gravity is always pushing the ball down.
It is the "mass" of a body which always remains same, regardless of gravity.
It is always different depending on the object. For example a female humans' center of gravity is in the hip. as a male humans' center of gravity is in the chest. But once you have found the center of gravity in an object the center of gravity should be the same in every object like it.