ScienceDaily: Astronomy News |
| Large coronal hole near the sun's north pole Posted: 19 Jul 2013 05:42 PM PDT Astronomers captured an image of a gigantic coronal hole hovering over the sun's north pole on July 18, 2013, at 9:06 a.m. EDT. Coronal holes are dark, low density regions of the sun's outermost atmosphere, the corona. They contain little solar material, have lower temperatures, and therefore, appear much darker than their surroundings. |
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