Answer:
https://www.google.com/search?rlz=1C1EJFC_enUS874US875&q=Where+is+alphonso+mastus&spell=1&sa=X&ved=2ahUKEwiPvMzFvKHoAhUCnawKHfIpB6kQBSgAegQIAxAn&biw=1366&bih=625
Explanation: google search it
Magma chamber
central vent
crater
I think
The O stars is the most luminous, then B, then A, F, G, K, and M stars are the least luminous_____ there must be a relationship between mass and luminosity.