ANCHORAGE, Alaska — A massive flare that exploded from the solar surface in March unleashed the highest-energy light ever seen during a sun eruption, scientists say.
On March 7, the sun let loose a massive X5.4 solar flare during its biggest outburst in five years. NASA's Fermi Gamma-ray Space Telescope saw an unusually long-lasting pulse of gamma rays — a form of light with even greater energies than X-rays — produced by the flare.
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