Image: Holes in the Sun's corona

Jan 12, 2011
Credit: NASA/SDO/AIA

This Solar Dynamics Observatory image of the Sun taken on January 10 in extreme ultraviolet light captures a dark coronal hole just about at sun center.

Coronal holes are areas of the Sun's surface that are the source of open that head way out into space.

They are also the source regions of the fast solar wind, which is characterized by a relatively steady speed of approximately 800 km/s (about 1.8 million mph).

As the continues to rotate, the high speed solar wind particles blowing from this hole will likely reach in a few days and may spark some auroral activity.

The timelapse video below shows the coronal hole moving into full view.

This video is not supported by your browser at this time.
This timelapse video shows a coronal hole, as captured in ultraviolet light by NASA's Solar Dynamics Observatory on Jan. 10, 2011. Coronal holes are areas of the sun's surface that are the source of open magnetic field lines that head way out into space. They are also the source regions of the fast solar wind, which "blows" at a relatively steady clip of 1.8 million mph.


Explore further: NASA craft set to beam home close-ups of Pluto

add to favorites email to friend print save as pdf

Related Stories

SECCHI team obtains images of the solar wind at Earth

Dec 07, 2007

Using the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI) instruments on board NASA’s Solar Terrestrial Relations Observatory (STEREO) spacecraft, a consortium of scientists has seen, for the first ...

Scientists Explore the Mystery of Active Region Outflows

Jun 25, 2010

(PhysOrg.com) -- The Japanese Hinode spacecraft that launched in September 2006 contains the Extreme-ultraviolet Imaging Spectrometer (EIS), which provides measurements of properties of the solar corona such ...

3D Sun for the iPhone

Feb 17, 2010

Imagine holding the entire sun in the palm of your hand. Now you can. A new iPhone app developed by NASA-supported programmers delivers a live global view of the sun directly to your cell phone. Users can ...

The Sun's X-file under the Spotlight

Sep 03, 2004

One of the Sun's greatest mysteries is about to be unravelled by UK solar astrophysicists hosting a major international workshop at the University of St Andrews from September 6-9th 2004. For years scientists have been baffled ...

The Sun Loses its Spots

Jul 24, 2007

While sidewalks crackle in the summer heat, NASA scientists are keeping a close eye on the sun. It is almost spotless, a sign that the Sun may have reached solar minimum. Scientists are now watching for the ...

Recommended for you

NASA craft set to beam home close-ups of Pluto

2 hours ago

Nine years after leaving Earth, the New Horizons spacecraft is at last drawing close to Pluto and on Sunday was expected to start shooting photographs of the dwarf planet.

Elon Musk's SpaceX drops lawsuit against Air Force

12 hours ago

A spacecraft company run by billionaire Elon Musk has dropped a lawsuit alleging the U.S. Air Force improperly awarded a contract to launch military satellites to a joint venture between Boeing and Lockheed ...

NASA spacecraft almost to Pluto: Smile for the camera!

Jan 23, 2015

It's showtime for Pluto. NASA's New Horizons spacecraft has traveled 3 billion miles and is nearing the end of its nine-year journey to Pluto. Sunday, it begins photographing the mysterious, unexplored, icy ...

Gullies on Vesta suggest past water-mobilized flows

Jan 23, 2015

(Phys.org)—Protoplanet Vesta, visited by NASA's Dawn spacecraft from 2011 to 2013, was once thought to be completely dry, incapable of retaining water because of the low temperatures and pressures at its ...

User comments : 0

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.