Every single thing in the universe that has mass will have gravity (although in some cases it is a really small amount). Although, there has been some theory as to the existence of dark matter (matter which has no mass at all, and is sort of an anti-mass).
No there are mass-less particles (particles with exactly 0 rest mass) for example the photon.
According to the Standard model (Ensteinian physics) there is no "gravity" but the mass of objects deforms the space-time continuum.
There is no minimum mass at which point an object (celestial or otherwise) begins to have a gravitational force. Any object with mass has an associated gravitational force. The magnitude of that force is proportional to to the mass of the object - lots of mass results in lots of gravitational force; little masses result in only little gravitational force.
Gravitational force of the moon is 1/6th the gravitational force of the Earth. The larger the object, the greater gravitational force it will have.
Gravitational force exerts an attraction on objects.
No, mass is the measure of matter in an object. Weight is the measure of gravitational force needed to keep the object grounded.
Universe has no weight because it has no Gravitational force
Yes it does.
Weight
Mutual force of gravitational attraction.
Weight
Gravitational force or magnetic force.
gravitational force
Because basically, every object in the Universe attracts every other object.
The object's weight is the measure of the gravitational force on that object.
Yes, everything has a gravitational force, but the force of this differs from object to object.
Yes. In fact, every object in the universe exerts a gravitational pull on every other object in the universe, but most of them are too small to notice.
no
The gravitational force exerted on an object, according to classical mechanics, is the product of the gravitational constant, the object's mass, and the mass of the object exerting the gravitational force divided by the square of the magnitude of the position vector starting from the object exerting the gravitational force and pointing to the object which we are measuring the force exerted onto. And all of this is times the negative of that same position vector.