TwitterFacebook

An Incredible Film From NASA: Gradient Sun

Coronal loops and magnetic fields
Science • Views: 29,298

Watching a particularly beautiful movie of the sun helps show how the lines between science and art can sometimes blur. But there is more to the connection between the two disciplines: science and art techniques are often quite similar, indeed one may inform the other or be improved based on lessons from the other arena. One such case is a technique known as a “gradient filter” — recognizable to many people as an option available on a photo-editing program. Gradients are, in fact, a mathematical description that highlights the places of greatest physical change in space. A gradient filter, in turn, enhances places of contrast, making them all the more obviously different, a useful tool when adjusting photos. Scientists, too, use gradient filters to enhance contrast, using them to accentuate fine structures that might otherwise be lost in the background noise. On the sun, for example, scientists wish to study a phenomenon known as coronal loops, which are giant arcs of solar material constrained to travel along that particular path by the magnetic fields in the sun’s atmosphere. Observations of the loops, which can be more or less tangled and complex during different phases of the sun’s 11-year activity cycle, can help researchers understand what’s happening with the sun’s complex magnetic fields, fields that can also power great eruptions on the sun such as solar flares or coronal mass ejections.

The images here show an unfiltered image from the sun next to one that has been processed using a gradient filter. Note how the coronal loops are sharp and defined, making them all the more easy to study. On the other hand, gradients also make great art. Watch the movie to see how the sharp loops on the sun next to the more fuzzy areas in the lower solar atmosphere provide a dazzling show.

^ back to top ^

TwitterFacebook

Turn off all ads for a full year by subscribing!
For about 33 cents a day (per month) or 22 cents a day (per year), our subscription option turns off all advertisements at LGF!
Read more...

► LGF Headlines

  • Loading...

► Tweeted Articles

  • Loading...

► Tweeted Pages

  • Loading...

► Top 10 Comments

  • Loading...

► Bottom Comments

  • Loading...

► Recent Comments

  • Loading...

► Tools/Info

► Tag Cloud

► Contact

You must have Javascript enabled to use the contact form.
Your email:

Subject:

Message:


Messages may be published unless you request otherwise.
Tech Note:
Using the Contact Form
LGF Pages

This button leads to the main index of LGF Pages, our user-submitted articles. You can post your own LGF Pages simply by registering a free account with us.

Create a Page

This is the LGF Pages posting bookmarklet. To use it, drag this button to your browser's bookmark bar, and title it 'LGF Pages' (or whatever you like). Then browse to a site you want to post, select some text on the page to use for a quote, click the bookmarklet, and the Pages posting window will appear with the title, text, and any embedded video or audio files already filled in, ready to go.

Or... you can just click this button to open the Pages posting window right away.

Last updated: 2014-03-07 2:19 pm PST

LGF User's Guide
Recent Pages
The Vicious Babushka
The Scientific Explanation of Why People Kill Each Other Over TVs on Black Friday
More: The Scientific Explanation of Why People Kill Each Other Over TVs on Black Friday What causes people to kick, shove and even stab each other on Black Friday? Each year there are reports of violence during the Black Friday ...

1 hour, 7 minutes ago
Views: 80 • Comments: 1
Tweets: 6 • Rating: 0
Skip Intro
Anti-Gay Hate Preacher Accidentally Tweets 4,000 Followers Cartoon Clip of Him ‘Confessing’ to Be a ‘Homosexual Sodomite’
Adam Reakes Promotes Truth That Starbucks Markets Semen Laced Lattes http://t.co/RY06dEEb0I— James David Manning (@DrJamesDManning) November 20, 2014

2 hours, 44 minutes ago
Views: 93 • Comments: 0
Tweets: 0 • Rating: 0
Randall Gross
Press Subpoenas Are a Bigger Problem Than You’d Think : Columbia Journalism Review
How can you demonstrate or cite "Chilling effects" when quashing subpoenas? Perhaps every reporter needs to ask every unnamed source if they would be talking if they thought the reporter wouldn't protect their identity as a pro forma question, and ...

4 hours, 13 minutes ago
Views: 83 • Comments: 0
Tweets: 0 • Rating: 0
Lumberhead
One Man Should Not Dictate Immigration Policy
Well played. You know, the more I mull over the Republican complaint about how immigration reform is being implemented, the more I sympathize with them. Public policy, especially on big, hot button issues like immigration shouldn't be made by one ...

20 hours, 36 minutes ago
Views: 228 • Comments: 6
Tweets: 0 • Rating: 6
teleskiguy
“Chelsea Hotel” performed by Tal Wilkenfeld
I first saw Austrailian bass player Tal Wilkenfeld play with Jeff Beck (not live, mind you. On YouTube) and was amazed at her skills and chops. She was only 20 when she scored that gig. She's coming into her own ...

2 days, 17 hours ago
Views: 167 • Comments: 0
Tweets: 0 • Rating: 4
FemNaziBitch
History of Laws Concerning Immigration and Naturalization in the United States -WIKI
The United States Constitution was adopted on September 17, 1787. Article I, section 8, clause 4 of the Constitution expressly gives the United States Congress the power to establish a uniform rule of naturalization.[1] Pursuant to this power, Congress ...

3 days, 1 hour ago
Views: 272 • Comments: 1
Tweets: 1 • Rating: 2
MichaelJ
COMFORTABLY NUMB - Peahi Nov 12 on Vimeo
Channel angle of the Nov 12th swell at Peahi.

6 days, 14 hours ago
Views: 435 • Comments: 0
Tweets: 1 • Rating: 2
Romantic Heretic
Money Makes Us Less Rational
Here's an interesting article on scientific studies that demonstrate how rationality and empathy break down is the presence of large amounts of money.

1 week, 2 days ago
Views: 658 • Comments: 2
Tweets: 0 • Rating: 2
Indy GOP Refugee
Dissent Goes Missing in Pro-Labor L.A. City Council - LA Times
That is not good govenance. The San Fernando Valley lawmaker stood up at a recent meeting and rattled off numbers from a new report on the city's economic health. Sales tax revenue? Up 26% since 2009. Business tax revenue? Up ...

1 week, 5 days ago
Views: 975 • Comments: 6
Tweets: 0 • Rating: -2
wheat-dogghazi-bola-trality
Uncomfortable Xi-Abe Handshake Spawns New Winnie the Pooh Comparison
Asian powerhouses China and Japan have not been on the best of terms lately, following disagreements over who has claim to some islands -- and possible undersea gas and oil fields -- in the South China Sea. So perhaps we ...

1 week, 6 days ago
Views: 2,029 • Comments: 0
Tweets: 1 • Rating: 4
 Frank says:

The worst aspect of 'typical familyism' (as media-merchandised) is that it glorifies involuntary homogenization.