| Online: | |
| Visits: | |
| Stories: |
Mystery at the sun’s south pole: Nasa reveals huge ‘coronal hole’ on the solar surface where winds reach 500 miles per SECOND
by Mark Prigg
Dailymail.com
Coronal holes are regions of the corona where the magnetic field reaches out into space
Particles moving along those magnetic fields can leave the sun rather than being trapped near the surface
Polar coronal hole can remain visible for five years or longer, although constantly changes shape
There were no fireworks on the sun to welcome in the New Year – and in fact, scientists say the end of the year was relatively quiet on the solar surface.
However, the sun has started 2015 with a mysterious event – a huge hole has appeared.
Known as a coronal hole, the phenomenon occurred near the south pole – and is seen as a dark area covered all of its base in these stunning images.
Coronal holes are regions of the corona where the magnetic field reaches out into space rather than looping back down onto the surface – and eject solar winds far faster than other parts of the sun.
Read more »
Every Day is Earth Day
Source: http://www.riseearth.com/2015/01/mystery-at-suns-south-pole-nasa-reveals.html
