MASS RECAP

Newton’s Laws of Gravity say that if we know 1) size of orbit 2) period of orbit then we can find the total mass of the system
Size of orbit: need either distance, or eclipsing spectroscopic binary
To find individual masses, must know where the Center of Mass of the system is
Stellar masses are 0.01 to 100 times Sun’s mass

Newton’s Laws of Gravity say that if we know 1) size of orbit 2) period of orbit then we can find the total mass of the system