what stage is the north star in?

Question

for an example like th e sun is in main sequence

Answer 1

Polaris is a supergiant. It is spectral type F7, luminosity class Ib. It is also a Cepheid variable, varying by .15 magnitude with a period of about 4 days. It has a 9th-magnitude main-sequence companion, classified F3V, visible in a small telescope.