Re: Is Betelgeuse About to go Supernovae?
Posted: Tue Jan 21, 2020 4:37 pm
That's cool. Thanks for the link.plodder wrote: ↑Thu Feb 27, 2020 5:10 amdon’t be so gloomy. here’s the content you need:
https://mobile.twitter.com/starstricken ... 3606515712
The one a few below 'of the moon making an appearance on our satelite images of the sun' reminds me of...cvb wrote: ↑Thu Feb 27, 2020 8:31 amThat's cool. Thanks for the link.plodder wrote: ↑Thu Feb 27, 2020 5:10 amdon’t be so gloomy. here’s the content you need:
https://mobile.twitter.com/starstricken ... 3606515712
Betelgeuse was resolved as a disc using optical interferometry as early as the 1930's I think.Martin Y wrote: ↑Sat Aug 15, 2020 12:49 pmI didn't follow that twitter link till now and I wonder if I misconstrued its talking about convection cells and starspots: is it actually possible to resolve any features at all of an object (even Betelgeuse-sized) 200 parsecs away? That seems impossible but I do keep finding myself having to recalibrate my boundaries of the possible.
Whole galaxies do it sometimes.AMS wrote: ↑Fri Aug 14, 2020 12:18 pmDust, apparently, and originating from the star itself. (Someone tell Philip Pullman.)
https://www.theguardian.com/science/202 ... betelgeuse
Is it normal for star to kick out enough dust to hide it from view?
Here's an image from December.Gfamily wrote: ↑Sat Aug 15, 2020 1:03 pmBetelgeuse was resolved as a disc using optical interferometry as early as the 1930's I think.Martin Y wrote: ↑Sat Aug 15, 2020 12:49 pmI didn't follow that twitter link till now and I wonder if I misconstrued its talking about convection cells and starspots: is it actually possible to resolve any features at all of an object (even Betelgeuse-sized) 200 parsecs away? That seems impossible but I do keep finding myself having to recalibrate my boundaries of the possible.
ETA 1920 apparently
I caught myself thinking "I know it's enormously bigger than the sun but 55mas at 200 parsecs; that would make Betelgeuse several times bigger than the entire orbit of the earth and... Oh. Wait. It is." Got the nagging feeling this was all familiar when I was young and I've got stupid. Guess I just haven't thought about in ages.