astro-throw

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2 jaar geledendiscuss

Another interesting quirk of Pop III stars is that their initial mass function is expected to form much more massive stars than Pop II or Pop I. So even if Pop III stars are longer lived at the same mass as Pop II or Pop I, there will be a lot more supernovae per time, leading to fast enrichment and then Pop II.

astro-throw

2 jaar geledendiscuss

We can see some things behind it, with neutrinos and gravity waves.

astro-throw

2 jaar geledendiscuss

These galaxies are so far away that they're very small on the sky, even at JWST's resolution. There's a reason why they're called "little red dots"!

astro-throw

2 jaar geledendiscuss

My experience is that Slack worked great last winter, when the broadband satellite was up. When it's down, folks use an IRC-style client to cope with the very limited & expensive bandwidth from Iridium.

astro-throw

2 jaar geledendiscuss

Pole doesn't have Starlink. McMurdo does. There are reasons.

Polar coverage from GEO satellites is limited because how close to the horizon GEO satellites are from Pole. Pole uses old GEO satellites which are low on fuel and have relatively large inclinations... then you can talk to them for ~ 6 hours per 24.

Schedule: https://www.usap.gov/technology/1935/

astro-throw

2 jaar geledendiscuss

Because of the lack of C, N, and O, which are catalysts in the CNO cycle. They aren't produced by it.

astro-throw

2 jaar geledendiscuss

… imagine what’s behind our galaxy!

astro-throw

2 jaar geledendiscuss

The word "generation" isn't really a thing in astronomy jargon. "Population III" is a population, and it includes stars formed after some supernovae, up to the point where the metals % gets high enough to be Population II.

astro-throw

2 jaar geledendiscuss

There's an endless supply of organic, free range cosmic rays that rain down from the sky. They've been scientifically useful in many ways, not just this one.

astro-throw

2 jaar geledendiscuss

The "full list" posted earlier has that one on it.