Quote:
Originally Posted by Robh
Al,
I thought it was just a dirty spot on my screen!
I didn't realise the image was continually updated. 
Thanks, Rob |
I think I've had a similar problem... it's been so long I haven't been taking much notice of the SOHO image...
Quote:
Originally Posted by Darth Wader
What's a "sunspot"?  |
A sunspot is an area of the sun's surface that is slightly cooler than the rest. It is caused by a strong local magnetic field that disrupts the convection of heat to the surface at that spot.
Sunspots usually vary in an eleven year cycle, but we've just recently gone through and extended minimum (not many sunspots).
Al.