Question

Can you explain me what is the "sustem reduced mass" ?

Answer 1

system* sorry

Answer 2

the reduced mass of a system is kind of like the combined mass. It is the effective mass inertial mass of a 2 body system.
For example, two planets orbiting one and other, you cant consider one being stationary, the two bodies orbit around a common center, so the reduced mass comes into play when you take this into acount

Answer 3

I didn't really understand the difference between reduced mass and combined mass...

Answer 4

There is a good explanation at the following link:
http://en.wikipedia.org/wiki/Reduced_mass

Answer 5

Oh thanks !

Answer 6

You're welcome :)