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Devastating solar storms could be far more common than we thoughtSolar super-storms capable of damaging electric grids and satellite networks may be much more common than previously thought, a study of Earth's oldest geomagnetic index suggests.
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Glowing green 'dunes' in the sky mesmerized skygazers. They turned out to be a new kind of aurora.The pattern of light was unfamiliar and strangely perfect, reaching out toward the horizon like a set of celestial sand dunes.
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Violent Solar Storms Are Happening Closer to Earth Than Anyone Thought Was PossibleThe spectacular solar storms that paint the polar skies in beautiful greens and pinks have a darker side
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On Mars, Auroras Glow All Summer Long in UV LightDuring summer in Mars' southern hemisphere, proton auroras occur nearly every day.
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What is the ionosphere? (And who is Steve?)A concentration of plasma in the Earth's atmosphere, called the ionosphere, interacts with solar winds, ultraviolet radiation and radio waves.
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In Images: Rising 'Phoenix' Aurora and Starburst Galaxies Light Up the SkiesCosmic marvels dazzle in the U.K.'s 'Astronomy Photographer of the Year' contest.
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'Phoenix' Aurora Spreads Its 'Wings' Over Abandoned Military Power Station in RussiaMore than 4,000 photographers shot for the moon (and beyond) for the Astronomy Photographer of the Year competition in the U.K.
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'Alien' Lights in Norway Were a NASA Test, Not an Extraterrestrial Visit'Alien' lights in Norway were a NASA mission, not an extraterrestrial visit.
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A 'Dragon Aurora' Appeared in the Sky Over Iceland, and NASA Is a Little ConfusedWhy did Maleficent suddenly appear over Iceland?
