2006-11-08 00:45:42 · 4 answers · asked by goring 6 in Science & Mathematics ➔ Physics
Approximately the mass of 2 billion solar masses.
p.s. Weight is a function of something in a gravitational field, what you really are asking about is mass.
2006-11-08 01:10:19 · answer #1 · answered by Radagast97 6 · 0⤊ 0⤋
We don't have an exact number. There are several things we can do to approximate the mass of the galaxy. First of all, you can determine the mass of an area of space by watching the stars move with respect to each other. By assuming that that is the average density of the galaxy, you can then determine how much mass is in the galaxy.
2006-11-08 08:55:37 · answer #2 · answered by merlin692 2 · 0⤊ 0⤋
weight is a function of gravity -- unless there is some other body whose gravity is acting on our milky-way -- so it is zero. as for as the mass is concerned it is a different matter.
2006-11-08 09:08:59 · answer #3 · answered by charlatan 7 · 0⤊ 0⤋
we don't .
2006-11-08 08:48:28 · answer #4 · answered by goodguy7 2 · 0⤊ 0⤋