Portal:Astronomy/Picture/Week 03 2006
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Sunspot_TRACE.jpeg/300px-Sunspot_TRACE.jpeg)
Sunspots are regions on the Sun's surface in which very strong magnetic fields cause lower temperatures than the surrounding solar surface, although very high temperatures are often observed above sunspots. This ultraviolet image shows gas at temperatures of over 1,000,000 K over a sunspot. Credit: NASA/TRACE