Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day -- Orange Sun Sparking
NASA ^ | May 06, 2014 | (see photo credit)

Posted on 05/05/2014 9:06:14 PM PDT by SunkenCiv

Explanation: Our Sun has become quite a busy place. Taken only two weeks ago, the Sun was captured sporting numerous tumultuous regions including active sunspot regions AR 2036 near the image top and AR 2036 near the center. Only four years ago the Sun was emerging from an unusually quiet Solar Minimum that had lasted for years. The above image was recorded in a single color of light called Hydrogen Alpha, inverted, and false colored. Spicules cover much of the Sun's face like a carpet. The gradual brightening towards the Sun's edges is caused by increased absorption of relatively cool solar gas and called limb darkening. Just over the Sun's edges, several filamentary prominences protrude, while prominences on the Sun's face are seen as light streaks. Possibly the most visually interesting of all are the magnetically tangled active regions containing relatively cool sunspots, seen as white dots. Currently at Solar Maximum -- the most active phase in its 11-year magnetic cycle, the Sun's twisted magnetic field is creating numerous solar "sparks" which include eruptive solar prominences, coronal mass ejections, and flares which emit clouds of particles that may impact the Earth and cause auroras. One flare two years ago released such a torrent of charged particles into the Solar System that it might have disrupted satellites and compromised power grids had it struck planet Earth.

May 06, 2014

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; science; sun
[Credit & Copyright: Alan Friedman (Averted Imagination)]

1 posted on 05/05/2014 9:06:14 PM PDT by SunkenCiv
[ Post Reply | Private Reply | View Replies]

To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; steelyourfaith; Mmogamer; dayglored; ...
The Big One

2 posted on 05/05/2014 9:07:42 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | View Replies]

To: SunkenCiv
The gradual brightening towards the Sun's edges is [...] called limb darkening.

Glad that was cleared up.
3 posted on 05/05/2014 9:13:25 PM PDT by Telepathic Intruder (The only thing the Left has learned from the failures of socialism is not to call it that)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv
a single color of light called Hydrogen Alpha

Whew. Hurts my eyes.

I'll take the cool blue Cherenkov radiation.

4 posted on 05/05/2014 9:16:53 PM PDT by MUDDOG
[ Post Reply | Private Reply | To 1 | View Replies]

To: Telepathic Intruder

LOL!


5 posted on 05/05/2014 9:39:16 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 3 | View Replies]

To: MUDDOG

:’)


6 posted on 05/05/2014 9:39:23 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
[ Post Reply | Private Reply | To 4 | View Replies]

To: Telepathic Intruder
Yeah. Here's a similar H-alpha shot with faithful exposure values. I'm not sure what they did to get that "cool" version.


7 posted on 05/05/2014 9:53:32 PM PDT by dr_lew
[ Post Reply | Private Reply | To 3 | View Replies]

To: SunkenCiv
Well, they did say it was inverted, after all. Here, this should also be more to MUDDOG's liking:


8 posted on 05/05/2014 9:53:54 PM PDT by Telepathic Intruder (The only thing the Left has learned from the failures of socialism is not to call it that)
[ Post Reply | Private Reply | To 5 | View Replies]

To: dr_lew

Inverted it. I sort of glossed over that part.


9 posted on 05/05/2014 9:58:38 PM PDT by Telepathic Intruder (The only thing the Left has learned from the failures of socialism is not to call it that)
[ Post Reply | Private Reply | To 7 | View Replies]

To: SunkenCiv

Wow, looks more like a spore or something with the image filtered that way.


10 posted on 05/05/2014 10:09:48 PM PDT by RegulatorCountry
[ Post Reply | Private Reply | To 1 | View Replies]

To: Telepathic Intruder
Well, I used Paint.net to invert the "faithful" image I posted, which came out blue, then used the "hue" adjustment to get this result which resembles the APOD, but does not show the whitish "limb-darkening".


11 posted on 05/05/2014 10:14:13 PM PDT by dr_lew
[ Post Reply | Private Reply | To 8 | View Replies]

To: dr_lew

Actually I can see that it’s slightly darker in the center than at the edges. This is what you’d expect to see . The darkening actually occurs because the edges are scattered by more solar atmosphere, even though you can’t see the atmosphere itself in that wavelength.


12 posted on 05/05/2014 10:52:44 PM PDT by Telepathic Intruder (The only thing the Left has learned from the failures of socialism is not to call it that)
[ Post Reply | Private Reply | To 11 | View Replies]

To: SunkenCiv

That picture reminded me of Anita Bryant.

She was arguably the first victim of the Lavender Mafia.

Isn’t that strange how our minds work?


13 posted on 05/06/2014 5:07:32 AM PDT by left that other site (You shall know the Truth, and The Truth Shall Set You Free.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv
Like that lucky old Sun ♩
♪ Give me nothing to do ♫
♬ But roll around Heaven all daaaaaaay!
14 posted on 05/06/2014 7:01:15 AM PDT by TheOldLady
[ Post Reply | Private Reply | To 2 | View Replies]

To: SunkenCiv

That view always looks like a sponge toy my cat digs out from under the bed covered in lint & dirt ;)


15 posted on 05/06/2014 9:40:54 AM PDT by mikrofon (Nerf from 'Erf')
[ Post Reply | Private Reply | To 2 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson