black spot

Giant black mark on the surface of the Sun.
The satellite of the US Aeronautics and Space Administration (NASA) captures the image of a dark Japanese hole near the polar region of the Sun.
New forecast on the solar cycle: fewer black spots, but not necessarily less active
A group of experts have made predictions about the next cycle of the sun, suggesting that the 24th cycle will peak at May 2013 with the number of black spots below average.
Strange, unimaginable things growing on top of
Have you ever looked at the fish head and asked the question: What is this and what is it used for? The following article may give you some suggestions.