I am not at all sure what you mean; the "source of gravity" of each star is its own mass, i.e., the star itself.
binary pair
The source of gravity of the moon is the same as anywhere else, all mass attracts all other mass, the effects depend on the amounts and the proximity
Bot stars and planets are spherical objects that are held together by gravity.
They are the corpses of some super giants. They are very small, but have the same gravity and mass as their old self.
The Basic Composition Varies for all stars. Regardless and Ir-regardless of The Source Cloud, all Stars are Unique.
By the gravity compression of interstellar gases - same as all other stars.
Gravity will attract 2 or more object with or without the presence of an electric source/field.
They are attracted to one another by gravity, which is not affected by electrical charge. Gravity is an attractive force that occurs between all objects with mass. You don't have positive and negative masses that attract and repel. The greater the mass, the greater the attraction. Second, the stars do not all have the same mass. The masses of stars vary considerably.
on very very clear nights yes starts are almost the same size as the sun.
Yes gravity is the same size on earth but not in outer space where there is no gravity.
It is really difficult to ascertain what the source of gravity is. It cannot be the rotation or the revolution around the sun because the moon also does the same around the earth and its axis yet is one-sixth the gravitational acceleration. Though the earth's profile (geoid) is shaped by the effect of gravity, gravitational acceleration does not have the same magnitude over the earth's atmosphere. One thing we know for sure is that the gravitational force is directed towards the earth's centre and at the earth's centre is the core. This is the source of the magnetic field that repels solar dust and with more research we might be able to fully understand gravity.
no gravity is a force mass is the same as weight