The huge coronal mass ejection erupting on the Sun (This picture: an overlay blended version of the 304 and 171
angstrom wavelengths).
Several hours ago I posted National Geographic’s article displaying new breathtaking aurora images which appeared on Monday. The following article explains the cause of this awesome display – a massive solar whip on the surface of the sun!
The power of the Sun: Now Nasa reveals VIDEO of a 500,000 mile 'solar whip' that caused an aurora on Earth
By Mark Prigg, Daily Mail, 7 September 2012.
By Mark Prigg, Daily Mail, 7 September 2012.
NASA today released a stunning video showing a 500,000 mile long 'solar whip' on the surface of the sun - and the beautiful aurora it created on earth.
Captured by NASA’s Solar Dynamics Observatory (SDO), the video shows in unprecedented detail a very long, whip-like solar filament extending over half a million miles in a long arc above the sun’s surface.
The coronal mass ejection, or CME, travelled at over 900 miles per second.
The CME did not travel directly toward Earth, but did connect with Earth's magnetic environment, or magnetosphere, with a glancing blow, causing aurora to appear on Monday evening.
| WHAT IS A 'SOLAR WHIP'? |
A 'solar whip' or filament is caused when a red glowing loop of plasma erupts, releasing the plasma out in huge loops hundreds of thousands of miles into space.
The filaments are anchored to the Sun's surface in the photosphere, and extend outwards into the Sun's hot outer atmosphere, called the corona.
|
The 'whip' was a filament, cooler clouds of solar material that are tethered above the sun’s surface by unstable magnetic forces.
The images and video (below), which covers August 6 to 8, 2012 show the filament as a darker strand that has been in view for several days.
Source: NASA
It snaps, sending radiation hurtling towards earth.
At the time, NASA revealed a video of the activity.
'Towards the end of the video part of the filament seems to break away, but its basic length and shape seem to have remained mostly intact,' says NASA.
The video, which condenses three hours of activity, also reveals the action in dramatic detail in extreme ultraviolet light.
The NOAA space weather prediction centre warned that a cloud of radiation from the eruption would reach Earth today.
The radiation cloud will create a minor to moderate geomagnetic storm, bringing the northern lights to parts of North America, it said.
To prove the point, NASA today revealed the image below, showing the aurora in breathtaking beauty.
 Swirls of green and red appear in an aurora over Whitehorse, Yukon on the night of September 3, 2012 following a massive eruption on the solar surface. |
NASA says the image is a classic example of a solar prominence (also known as a filament when viewed against the solar disk).
This is a large, bright feature extending outward from the Sun's surface.
Prominences are anchored to the Sun's surface in the photosphere, and extend outwards into the Sun's hot outer atmosphere, called the corona.
A prominence forms over timescales of about a day, and stable prominences may persist in the corona for several months, looping hundreds of thousands of miles into space.
However, scientists are still researching how and why prominences are formed.
The red-glowing looped material is plasma, a hot gas comprised of electrically charged hydrogen and helium.
The prominence plasma flows along a tangled and twisted structure of magnetic fields generated by the sun’s internal dynamo.
An erupting prominence occurs when such a structure becomes unstable and bursts outward, releasing the plasma [see also top image].
 On August 31, 2012 a long filament of solar material that had been hovering in the sun's atmosphere, the corona, erupted out into space at 4:36 p.m. EDT. The coronal mass ejection, or CME, travelled at over 900 miles per second. |
 An image created by blending two different wavelengths of the magnificent coronal mass ejection on the Sun on 31 Aug 2012. |
 This incredible image from NASA's Solar Dynamics Observatory (SDO) shows a very long, whip-like solar filament in the centre of the image, extending over half a million miles in a long arc above the sun's surface. |
 The video also reveals what the filament looks like closer to the surface of the sun. |
 This image of a previous solar filament of the sun's surface shows the scale of eruptions. |
[Source: Daily Mail. Edited.]
No comments:
Post a Comment
Please adhere to proper blog etiquette when posting your comments. This blog owner will exercise his absolution discretion in allowing or rejecting any comments that are deemed seditious, defamatory, libelous, racist, vulgar, insulting, and other remarks that exhibit similar characteristics. If you insist on using anonymous comments, please write your name or other IDs at the end of your message.