[Migrated, see pinned post] Casual Conversation

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Share a story, ask a question, or start a conversation about (almost) anything you desire. Maybe you'll make some friends in the process.

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Encourage conversation in your OP. This means including heavily implicative subject matter when you can and also engaging in your thread when possible.
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Deneb Is a neat star. Most of the 30 brightest stars in the sky are bright because they're close to us. Not Deneb. (lemmy.dbzer0.com)

submitted 3 months ago by [email protected] to c/[email protected]

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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.

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[–] [email protected] 2 points 3 months ago (1 children)

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.

[–] [email protected] 2 points 3 months ago* (last edited 3 months ago) (1 children)

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!

[–] [email protected] 2 points 3 months ago

Well...

I started casual...