Stellar classification - Wikipedia
Por um escritor misterioso
Descrição
Variable star - Wikipedia
G-type main-sequence star - Wikipedia
What type of star can have a surface temperature higher than that of the sun and a luminosity considerably lower than that of the sun? - Quora
Canopus - Wikipedia
Harvad Classification - spectra
Hydrogen-deficient star - Wikipedia
Stellar classification, Space Wiki
Stellar Classification, Beyond Universe Wiki
Types of Stars Stellar Classification, Lifecycle, and Charts
Hubble sequence - Wikipedia
Cosmic distance ladder - Wikipedia