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41.9 x 32.0 cm ⏐ 16.5 x 12.6 in (300dpi)
ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Carrington's flare. Diagram of the solar flare and associated sunspot group observed by Richard Carrington on 1st September 1859. The flare caused a large electromagnetic storm on Earth on the 2nd September, causing auroras in sky and sending the relatively new telegraph system in to meltdown.
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