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New Image of magnetic field lines of the Sun

From Mercury to Pluto and beyond. . .

Postby sandra » Mon Aug 23, 2010 8:54 pm

Magnetic field lines on the Sun, on August 20, 2010. Credit: NASA SDO/Lockheed Martin Space Systems Compan
The Sun's corona is threaded with a complex network of magnetic fields, and this amazing new image from the Solar Dynamics Observatory shows the magnetic field lines associated with a coronal hole that is now turning to face Earth. This map is from data taken on August 20, 2010 by the Helioseismic and Magnetic Imager instrument (HMI). The magnetic field lines are color coded: white lines show fields that are closed, not releasing solar wind, and gold lines show open fields, letting solar wind escape. Understanding these magnetic fields is important because it is thought that solar storms and flares, which can affect us here on Earth, result from changes in the structure and connections of these fields.

Coronal holes are large regions in the corona that are darker, less dense and cooler than surrounding areas. The open structure of their magnetic field allows a constant flow of high-density plasma to stream out of the holes. There is an increase in the intensity of the solar wind effects on Earth when a coronal hole faces.
During a solar minimum, such as the one from which the Sun is just emerging, coronal holes are mainly found at the Sun's polar regions, but they can be located anywhere on the sun during solar maximum. The fast-moving component of the solar wind is known to travel along open magnetic field lines that pass through coronal holes.
Scientists are finding out that much of the structure of the Sun's corona is shaped by the magnetic field. Although it varies over time and from place to place on the Sun, the Sun's magnetic field can be very strong. Inside sunspots, the magnetic field can be several thousand times the strength of the Earth's magnetic field.
http://www.universetoday.com/71872/amaz ... f-the-sun/

check the picture out at the above link, its pretty cool.
“Living backwards!” Alice repeated in great
astonishment. “I never heard of such a thing!”
“—but there’s one great advantage in it, that one’s
memory works both ways.”
— Lewis Carroll, Through the Looking-Glass
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Postby sandra » Sat Sep 11, 2010 6:25 pm

The sun unleashes impressive solar flare, Wednesday -
Wish I could find more pictures, looks awesome.
http://www.space.com/scienceastronomy/s ... 00910.html
“Living backwards!” Alice repeated in great
astonishment. “I never heard of such a thing!”
“—but there’s one great advantage in it, that one’s
memory works both ways.”
— Lewis Carroll, Through the Looking-Glass
User avatar
sandra
 
Posts: 3702
Joined: Fri Dec 04, 2009 6:27 pm
Location: Minnesota US


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