Some 50 miles up in the sky begins a dynamic region of the atmosphere known as the ionosphere. The region is filled with charged particles created by extreme ultraviolet radiation from the sun. At the base of the ionosphere, ...
Space Exploration
Jul 5, 2011
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The Sun unleashed an M-2 (medium-sized) solar flare, an S1-class (minor) radiation storm and a spectacular coronal mass ejection (CME) on June 7, 2011 from sunspot complex 1226-1227. The large cloud of particles mushroomed ...
Space Exploration
Jun 7, 2011
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Every 11 years, the sun undergoes a furious upheaval. Dark sunspots burst forth from beneath the sun's surface. Explosions as powerful as a billion atomic bombs spark intense flares of high-energy radiation. Clouds of gas ...
Space Exploration
Oct 28, 2009
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Every 11 years, the sun undergoes a furious upheaval. Dark sunspots burst forth from beneath the sun's surface. Explosions as powerful as a billion atomic bombs spark intense flares of high-energy radiation. Clouds of gas ...
Space Exploration
Sep 22, 2009
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A team headed by Professor Frank Stienkemeier at Freiburg's Institute of Physics and Dr. Marcel Mudrich, professor at the University of Aarhus in Denmark, has observed the ultrafast reaction of nanodroplets of helium after ...
Quantum Physics
Jan 8, 2020
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A visit to the optometrist often involves optical coherence tomography. This imaging process uses infrared radiation to penetrate the layers of the retina and examine it more closely in three dimensions without having to ...
Optics & Photonics
Aug 8, 2017
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Researchers are investigating novel ways by which electrons are knocked out of matter. Their research could have implications for radiation therapy.
General Physics
Dec 7, 2016
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On April 17, 2016, an active region on the sun's right side released a mid-level solar flare, which can be seen in this movie as a bright flash of light.
Space Exploration
Apr 26, 2016
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The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and die down repeatedly. Its Extreme ultraviolet Imaging Telescope has taken images ...
Space Exploration
Jul 13, 2015
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NASA's Solar Dynamics Observatory, which watches the sun constantly, captured these images of a significant solar flare – as seen in the bright flash on the left – peaking at 6:11 p.m. EDT on May 5, 2015.
Space Exploration
May 7, 2015
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