What is the total mass of a binary star system if Star A is 1 solar mass and Star B is 3 solar masses?

In a binary star system, the total mass is simply the sum of the individual masses of the stars involved. Here, Star A has a mass of 1 solar mass, and Star B has a mass of 3 solar masses.

To find the total mass of the system, you add the two masses together:

1 solar mass (Star A) + 3 solar masses (Star B) = 4 solar masses.

This calculation shows that the total mass of the binary star system is 4 solar masses. This concept is fundamental in astrophysics, especially when analyzing binary systems, where understanding the total mass can provide insights into their dynamics, gravitational interactions, and influence on surrounding celestial bodies.