Hey, my eye just captured some light that, depending on whose measurements are correct, is either as old as the Middle ages, or predates the Christian era.
Hey, my eye just captured some light that, depending on whose measurements are correct, is either as old as the Middle ages, or predates the Christian era.
Yeah. It’s big and bright and far. There’s one other “naked eye” star that’s further away, but it’s a lot dimmer. Deneb is unique in a lot of ways.
See for yourself!
https://en.wikipedia.org/wiki/Deneb?wprov=sfla1
Wait how would a star “evolve bluewards again”? I thought when a star fuses all of its smaller elements into heavier ones, it’s a one way trip
Recent stellar evolution computations show that the blue supergiant (BSG) stars could come from two distinct populations: a first group arising from massive stars that just left the main sequence and are crossing the Hertzsprung–Russell diagram (HRD) towards the red supergiant (RSG) branch, and a second group coming from stars that have lost considerable amount of mass during the RSG stage and are crossing the HRD for a second time towards the blue region.
Wow. This goes well beyond “casual conversation” 😅
But your article is saying that it happens, and a large factor is mass being ejected, and I can understand that I suppose. Cool!
Well…
I started casual…