Image: Coronal loops in an active region of the sun

Feb 19, 2014
Credit: NASA/Solar Dynamics Observatory

An active region of the sun just rotating into the view of NASA's Solar Dynamics Observatory gives a profile view of coronal loops over about a two-day period, from Feb. 8-10, 2014.

Coronal loops are found around sunspots and in active regions.

These structures are associated with the closed magnetic field lines that connect magnetic regions on the solar surface.

Many last for days or weeks, but most change quite rapidly.

This image was taken in extreme ultraviolet light.

Explore further: NASA's SDO sees giant January sunspots

add to favorites email to friend print save as pdf

Related Stories

NASA's SDO sees giant January sunspots

Jan 07, 2014

An enormous sunspot, labeled AR1944, slipped into view over the sun's left horizon late on Jan. 1, 2014. The sunspot steadily moved toward the right, along with the rotation of the sun, and now sits almost ...

Four cool views of the hot, loopy, spotty sun

Jan 09, 2013

A few sunspots are now 'peppering" the surface of our Sun—Spaceweather.com lists about 12 different sunspot groups today. Yesterday (January 7, 2013), astrophotographer John Chumack stepped outside over ...

Sun's loops are displaying an optical illusion

Jul 09, 2013

(Phys.org) —The Sun's outer atmosphere, or corona, has posed an enduring mystery. Why is it so hot? The Sun's visible surface is only 10,000 degrees Fahrenheit, but as you move outward the temperature shoots ...

Large coronal hole near the sun's north pole

Jul 20, 2013

The European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, captured this image of a gigantic coronal hole hovering over the sun's north pole on July 18, 2013, at 9:06 a.m. EDT. Coronal holes ...

Prelude to an X-Class solar flare

Jul 17, 2012

What takes place on the Sun before it unleashes a huge solar flare? It’s a thing of beauty, and observations from the Solar Dynamics Observatory are helping scientists understand how magnetic energy on ...

Image: Coronal hole on the sun

Jun 06, 2012

(Phys.org) -- This image of a coronal hole on the sun bears a remarkable resemblance to the 'Sesame Street' character Big Bird. Coronal holes are regions where the sun's corona is dark.

Recommended for you

SDO captures images of two mid-level flares

23 hours ago

The sun emitted a mid-level flare on Dec. 18, 2014, at 4:58 p.m. EST. NASA's Solar Dynamics Observatory, which watches the sun constantly, captured an image of the event. Solar flares are powerful bursts ...

Why is Venus so horrible?

Dec 19, 2014

Venus sucks. Seriously, it's the worst. The global temperature is as hot as an oven, the atmospheric pressure is 90 times Earth, and it rains sulfuric acid. Every part of the surface of Venus would kill you ...

Image: Christmas wrapping the Sentinel-3A antenna

Dec 19, 2014

The moment a team of technicians, gowned like hospital surgeons, wraps the Sentinel-3A radar altimeter in multilayer insulation to protect it from the temperature extremes found in Earth orbit.

Video: Flying over Becquerel

Dec 19, 2014

This latest release from the camera on ESA's Mars Express is a simulated flight over the Becquerel crater, showing large-scale deposits of sedimentary material.

Spinning up a dust devil on Mars

Dec 19, 2014

Spinning up a dust devil in the thin air of Mars requires a stronger updraft than is needed to create a similar vortex on Earth, according to research at The University of Alabama in Huntsville (UAH).

User comments : 3

Adjust slider to filter visible comments by rank

Display comments: newest first

cantdrive85
1 / 5 (1) Feb 23, 2014
These structures are associated with the closed magnetic field lines that connect magnetic regions on the solar surface.

Are they insinuating there are "open" field lines? Oh right, they are! Open field lines flapping in the interstellar breeze yearning there be an interstellar twin of him to latch onto...
Captain Stumpy
not rated yet Feb 23, 2014
@cantdrive
are you illiterate?
you QUOTED
These structures are associated with the closed magnetic field lines that connect magnetic regions on the solar surface

from the article...
then you say:
Are they insinuating there are "open" field lines? Oh right, they are! Open field lines flapping in the interstellar breeze yearning there be an interstellar twin of him to latch onto...


we already knew you were a pseudo-science acolyte
now
Cantdrive=TROLL

Tim Thompson
5 / 5 (2) Feb 25, 2014
Are they insinuating there are "open" field lines? Oh right, they are! Open field lines flapping in the interstellar breeze yearning there be an interstellar twin of him to latch onto...

No, they are not. You simply don't understand enough physics to know what they are saying. In the jargon of solar physics, an "open" field line is one that does not connect back to the sun. It connects instead to a planetary magnetic field, or to the interstellar magnetic field. Nobody suggests that there are field lines "flapping in the breeze", that's just something you are making up.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.