The lifespan of a main sequence star is given by the relation: T = 1 / M^2.5 Where T is time in solar lifetime (10^10 years) and M is mass in solar masses. Therefore, T = 1 / 15^2.5 = ~0.001 solar years or 1.14755x10^7 years
First of all, there cant be a white main-sequence star. White would be a white dwarf, red a giant or super giant. There can be blue, yellow, orange, red and anything in between those i guess. The...
Useless answer: Because there is an infinite number of stars there is also an infinite number of any subgroup of stars; Infinity divided by 5 billion = infinity ^^They mean the number of stars you...
Polaris - the current North star is a multiple star system. The main star Alpha Ursae Minoris is a bright or a possible supergiant with a spectral class of F7. So it's a main sequence star. It's...