Wait. If it has different composition from the Sun how can watching it predict the Sun’s behavior?
The Sun’s gonna do what it does and there is nothing we can do about it. Even if they could predict an ice age no one would do anything about it in govt anyhow until it is too late.
Not necessarily predict but understand the Sun’s behavior................
It has a very similar composition to the sun, just with more 'trace' elements. This gives us some benchmarks with which to contrast their behavior. More trace elements yields a shorter sunspot cycle. Our sun has about 99.9% Hydrogen and Helium (3:1) and about .1% other stuff. That gives us a solar cycle of about 11 years. The other star has .2% other stuff. That gives it a cycle of about 7.4 years. There is probably a formula for the cycle time where the cycle time decays exponentially with the amount of trace elements present.