If a star has a spectral type of B9 and an absolute magnitude of +11, what star stage was it most likely just BEFORE this?

Which of the following is NOT a known type of variable star?

What is the period shown on this light curve graph for this variable star?

If a type 1 cepheid variable has a period of 12 days, what is a likely absolute magnitude?

If you were comparing two cepheid variables, star Y with a period of 7 days and star Z with a period of 28 days, which would have a brighter absolute magnitude?

If a star has an average absolute magnitude of 0 and an average spectral type of A7. To what type of variable star category would it belong?

What variable star category does this light curve belong to?

Cepheids and Supernovas have recognizable and predictable light curves. These can be used to calculate absolute magnitudes and even distances. This makes them good:

What are the correct life cycle stages for a star with a (Yerkes) spectral classification of M8Ia and an absolute magnitude of -6?

Hint: the coding after the spectral class corresponds to an area depicted on the HR diagram