HENNING DALHOFF / SCIENCE PHOTO LIBRARY HENNING DALHOFF / SCIENCE PHOTO LIBRARY
Solar flare. Computer artwork of a large solar flare (orange lines) directed towards the Earth. A solar flare is an explosion in the Sun's atmosphere that causes a large increase in levels of dangerous radiation and charged particles. Many of these particles are deflected by the Earth's magnetic field (grey lines), but strong flares can still cause electromagnetic storms that disrupt power supplies and cause auroras in the sky.
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