Starship Asterisk*

[quote=lrgmbr1151 post_id=320266 time=1643521973 user_id=145875]
Today's (1/30/22) beautiful shot of the enormous solar prominence from 1999 poses my question: how long is such an individual event visible... how long does it last?
[/quote]

[quote][url]https://en.wikipedia.org/wiki/Solar_prominence[/url]
Prominences form over timescales of about a day and may persist in the corona for several weeks or months, looping hundreds of thousands of kilometers into space. [/quote]

[quote=bystander post_id=320272 time=1643556162 user_id=112005]
[quote][/quote][quote=XgeoX post_id=320268 time=1643542933 user_id=145282]
To the powers that be, you are not showing the picture in the comments, nor are the comments showing up in the page linked to by the “discuss” button and it’s also titled a “sloar” prominence in the title of the comments.
Other than that, no problems! (It’s all good in the hood, no biggie! 😉)
[/quote]
Maybe if you had went to the proper discussion page instead of one created by some newb who doesn't know how to use the <Discuss> link on APOD. If the thread isn't created by the APOD Robot (auto generated), it's not official.
[/quote]

I went to the one linked to on the official page. If It’s that’s not official oh well…
You might want to follow Mr. Keillor’s advice!

Eric

Thanks Chris and Art!

[quote="Chris Peterson" post_id=320277 time=1643564578 user_id=117706]
[quote="orin stepanek" post_id=320273 time=1643558444 user_id=100812]

Interesting that the sun goes into a 11 year cycle!
Does this show the stability of the Sun?⁉️ [/quote]

If you're really looking at the underlying theory (including its relevance to solar stability) you need to consider that it's actually a 22 year cycle. The 11-year cycle is actually a half cycle, as the Sun's magnetic polarity reverses every 11 years. The so-called 11-year cycle refers to the [i]magnitude [/i]of activity and ignores the [i]polarity[/i].
[/quote]
https://www.syfy.com/syfy-wire/bad-astronomy-huge-solar-storm-9200-year-ago-discovered-in-ancient-ice-cores

[quote="orin stepanek" post_id=320273 time=1643558444 user_id=100812]
Interesting that the sun goes into a 11 year cycle!
Does this show the stability of the Sun?⁉️
[/quote]

If you're really looking at the underlying theory (including its relevance to solar stability) you need to consider that it's actually a 22 year cycle. The 11-year cycle is actually a half cycle, as the Sun's magnetic polarity reverses every 11 years. The so-called 11-year cycle refers to the [i]magnitude [/i]of activity and ignores the [i]polarity[/i].

Orin Stephanek wrote, Interesting that the sun goes into a 11 year cycle!
Does this show the stability of the Sun?

I suppose so. I would think though that a greater showing of stability of the Sun is that it has been around for some 4 billion years and in all that time it has remained stable enough to allow very temperature sensitive life forms (that can only exist in a narrow temperature range of some 150 degrees F.) to evolve and survive on planet Earth in the Goldilocks zone.

[attachment=0]sunprom3_soho_2100.jpg[/attachment]
Solar flares are verv huge! :shock:
[attachment=1]sunmagcarp3_soho.jpg[/attachment]
I don't wanna walk on this carpet! :mrgreen:
Interesting that the sun goes into a 11 year cycle!
Does this show the stability of the Sun?⁉️

[quote][/quote][quote=XgeoX post_id=320268 time=1643542933 user_id=145282]
To the powers that be, you are not showing the picture in the comments, nor are the comments showing up in the page linked to by the “discuss” button and it’s also titled a “sloar” prominence in the title of the comments.
Other than that, no problems! (It’s all good in the hood, no biggie! 😉)
[/quote]
Maybe if you had went to the proper discussion page instead of one created by some newb who doesn't know how to use the <Discuss> link on APOD. If the thread isn't created by the APOD Robot (auto generated), it's not official.

The Sun's NASA is a heck of a lot better than OUR NASA. Our NASA launches against 1 g. The Sun's NASA launches against 28 g. It uses magnetic fields to do it. But its average magnetic field is, as I recall, about 1 gauss compared to our 1/2 gauss. So how does it do it? It gathers magnetic field (sunspots etc) and wham! And it sometimes hurls huge blobs of gas out into the solar system. On rare occasions such a blob hits Earth, and causes consternation. (That's ALL we'd need on top of Covid, right?)

To the powers that be, you are not showing the picture in the comments, nor are the comments showing up in the page linked to by the “discuss” button and it’s also titled a “sloar” prominence in the title of the comments.
Other than that, no problems! (It’s all good in the hood, no biggie! 😉)

Must say this picture bears a strong resemblance to “Adult Swim’s”…

[img] https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/64bb93b9-a6ec-4fe9-ad01-e50cbeef33de/d2h5m5j-69df9048-a614-4117-936d-5ff41fdfe041.jpg?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwic3ViIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsImF1ZCI6WyJ1cm46c2VydmljZTpmaWxlLmRvd25sb2FkIl0sIm9iaiI6W1t7InBhdGgiOiIvZi82NGJiOTNiOS1hNmVjLTRmZTktYWQwMS1lNTBjYmVlZjMzZGUvZDJoNW01ai02OWRmOTA0OC1hNjE0LTQxMTctOTM2ZC01ZmY0MWZkZmUwNDEuanBnIn1dXX0.9zT7ujZMI8s4bcRS-RqYvRYhbJxVJ_-WEa4gOlnd1lY[/img]

Eric

Today's (1/30/22) beautiful shot of the enormous solar prominence from 1999 poses my question: how long is such an individual event visible... how long does it last?

[url=https://apod.nasa.gov/apod/ap220130.html] [img]https://apod.nasa.gov/apod/calendar/S_220130.jpg[/img] [size=150]A Solar Prominence from SOHO[/size][/url]

[b] Explanation: [/b] How can gas float above the Sun? Twisted [url=https://apod.nasa.gov/apod/ap971106.html]magnetic[/url] fields arching from [url=http://hesperia.gsfc.nasa.gov/~knisely/course_development.html]the solar surface can[/url] trap ionized gas, suspending it in huge looping structures. These majestic [url=https://science.nasa.gov/science-news/science-at-nasa/1999/ast07sep99_1]plasma[/url] arches are seen as [url=https://en.wikipedia.org/wiki/Solar_prominence]prominence[/url]s above the solar limb. In 1999, [url=http://sohowww.nascom.nasa.gov/gallery/images/superprom.html]this dramatic and detailed image[/url] was recorded by the Extreme [url=https://science.nasa.gov/ems/10_ultravioletwaves]ultraviolet[/url] Image Telescope (EIT) on board [url=https://sohowww.nascom.nasa.gov/about/about.html]the space-based SOHO observatory[/url] in the light emitted by [url=https://apod.nasa.gov/apod/ap960520.html]ionized Helium[/url]. It shows [url=https://youtu.be/6qMMlmoz5O8?t=125]hot plasma escaping[/url] into space as a fiery prominence breaks free from [url=https://en.wikipedia.org/wiki/Coronal_mass_ejection]magnetic confinement[/url] a hundred thousand kilometers above the Sun. [url=https://apod.nasa.gov/apod/ap081004.html]These awesome events[/url] [url=https://apod.nasa.gov/apod/ap190526.html]bear watching[/url] as they can [url=https://www.nasa.gov/topics/earth/features/sun_darkness.html]affect communications and power systems[/url] over 100 million kilometers away on [url=https://apod.nasa.gov/apod/ap070325.html]planet Earth[/url]. In late 2020 our Sun passed the [url=https://www.nasa.gov/mission_pages/sunearth/news/solarmin-max.html]solar minimum[/url] of its [url=https://scijinks.gov/solar-cycle/]11-year cycle[/url] and is now showing [url=https://www.swpc.noaa.gov/products/solar-cycle-progression] increased surface activity[/url].


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