That's called the center of mass.
Centre of gravity.
The centre of mass.
No because enable to see if the object is moving it needs a reference point other than itself.
No... Newton's 1st law says that In the absence of a net force, the center of mass of a body either is at rest or moves at a constant velocity. Therefore there may be a case that no force is acting on the body but it is moving with a constant velocity... (Centre of mass is a point where all the mass is assumed to be concentrated...For symmetrical objects it is their geometrical centre...)
To identify and objects location you need three pieces of information. These are a reference point, a distance from the reference point, and a direction from the reference point.
center of mass
Centre of gravity.
Objects move fastest when they are closest to the primary object. In the case of Mercury, it moves fastest when it is closest to the Sun.
The centre of mass.
neutral point
5 centimeters to the right from the point of origin
Movement Occurs When an Object moves Relative to a Stationary Object
Its speed.
The point of which one objects hits or collides with another object. (The point of impact).
I think it's important to know if your reference point moves because your reference point is the object that's not supposed to move and if it moves it will mess up your hypothesis of thinking that your 1st object moves. It takes a while to completely understand the answer, or even the question
It is a point where conceptually the entire mass of an object can be considered to be concentrated
There is no such thing. Do you mean definition? If so, it is the point at which the mass of an object can be considered to be effective/concentrated.