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Radiation storm signals next solar cycle

作者:益县    发布时间:2019-02-27 09:11:02    

THE bright blip at the left of this image could mean there’s a storm brewing on the Sun. The blip marks a region of intense ultraviolet radiation caused by a sudden release of magnetic energy, and it may signal the beginning of a new cycle of solar activity. High levels of solar UV radiation expand the Earth’s upper atmosphere and can have other effects, such as altering the orbit of some satellites. This high resolution image was taken by the Extreme Ultraviolet Imaging Telescope (EIT), one of a dozen telescopes aboard the Solar and Heliospheric Observatory (SOHO). Brighter speckles on the image indicate other strong blasts of UV radiation associated with the Sun’s magnetic field. Unlike previous instruments, the EIT can take multiple images and allow astronomers to study the evolution of solar structures. “Basically, we have a video camera in space,” says Joseph Gurman,

 

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