Tuesday, May 13, 2014

Nasa Spots 'Square Hole' In The Sun's Surface

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A near-perfect square 'hole' in the sun has been caught on camera by Nasa.
An updraft of solar winds ripped the shape in the sun’s outer atmosphere, and the results were spotted by the agency’s Solar Dynamics Observatory which monitors the star.
The dark spot is known as a coronal hole, and is made when solar winds pull away from the sun at incredibly high speeds.
It appears dark in ultraviolet light because there is less material to emit the wavelengths.
Nasa said: "A coronal hole is an area where high-speed solar wind streams into space.
"Inside the coronal hole you can see bright loops where the hot plasma outlines little pieces of the solar magnetic field sticking above the surface."
The shape of the coronal hole happened merely by chance, as they can come in a variety of shapes and sizes.
The hole occurred over two days but Nasa has condensed the footage into 14 seconds.
The event happened on March 29, but Nasa has only recently analysed the data.
In 2013 the sun’s activity peaked as part of its 11-year solar weather cycle.

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