Hello,

Scientists are very particular about distinguishing between "weight" and "mass." In normal everyday situations, mass is basically a measure of the amount of matter in an object, but this changes if the object is moving at relativistic speeds (close to the speed of light). Weight is the measure of the force of gravity exerted on an object at the surface of the Earth or the Moon or another planetary body. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon, since the Moon is much smaller than the Earth. The term weight and mass are often confused with each other, but they are really two different concepts. We can't put the Sun at the surface of the Earth, so it isn't really useful to talk about the weight of the Sun. However, the Sun's mass is about 2x10³⁰ kg or about 332,946 times the mass of the Earth.

Kris