Ted asked basically how do you weigh the pulsar. As explained in my previous comment, you don't exactly "weigh" a pulsar, you determine or calculate its mass.

It boils down to each partical of matter (mass) atracts another partile (or all particles) in the Universe. This force varies by square of its distance from another partical. Three times the distance would have 1/9 of the force, etc. Each nearby particle, due to its mass, would experience for this gravitational force directly as the product of their total mutual masses and taper of the inverse square of its distance. After observing the speed of the body in orbit stound a star, it's "sun", the earth, etc. The astronomer from this given data can then calculate its mass.

You couldn't "weigh" a pulsar. Weight is a local phenomanon experienced by something within a gravitational field. The baseball-size piece of a pulsar would weigh 1/6 of the Empire State Building on the moon.

The term mass should be used. Its mass is the amount of matter that the pulsar consists of. In the absence of another massive body nearby it would be essentially weightless. But mass does have inertial: a body at rest remains at rest, a body in motion continues in motion in a certain direction with a certain velocity, which remains going that way unless a force acts on it, such as a gravitational field or a rocket engine attached to it. Newton explained it more eloquently and completely over 300 years ago.

How do you know what the weight of a pulsar is.

The question wasn't answered, you only told us what a piece of a pulsar would weigh on Earth - not what a pulsar actually weighs.

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