ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Sunspots observation. Photograph, obtained on 11th November 1907 by the astronomer Newbigin, of sunspots (dark areas) near the edge (limb) of the Sun. Sunspots, first observed with telescopes in 1610, are areas of magnetic activity that are cooler than the rest of the Sun's surface. They are massive structures, ranging in size from hundreds of kilometres across to sizes larger than the Earth. Sunspots were first photographed in 1845.
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