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Solar eclipse of August 21, 2017
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A total solar eclipse will take place on Monday, August 21, 2017. It will have a magnitude of 1.0306 that will be visible from a narrow corridor through the United States. The longest duration of totality will be 2 minutes 40 seconds at 36°58.5'N 87°39.3'W in Christian County, Kentucky just northwes...
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Coronal mass ejection
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New images reveal never-before-seen structures of the solar wind as it travels toward and impacts Earth Using data collected by NASA's STEREO spacecraft, researchers at Southwest Research Institute and the National Solar Observatory have developed the first detailed images of solar wind stru...
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Sun 01.03.12
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A new sunspot 11427, and sunspot 11423 (lower left), captured with a 100mm refractor and Vesta pro webcam. Solar filter + Baader contrast filter + IR-cut filter. 2x Barlow lens. Su...
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Solar Cycle 23
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Title: The Minimum of Solar Cycle 23: As Deep as It Could Be? Author: Andrés Muñoz-Jaramillo, Ryan R. Senkpeil, Dana W. Longcope, Andrey G. Tlatov, Alexei A. Pevtsov, Laura A. Balmaceda, Edward E. DeLuca, Petrus C. H. Martens In this work we introduce a new way of binning sunspot group data with the pu...
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Sun 26.12.01
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Title: The 26 December 2001 Solar Eruptive Event Responsible for GLE63. III. CME, Shock Waves, and Energetic Particles Author: V.V. Grechnev (1), V.I. Kiselev (1), A.M. Uralov (1), K.-L. Klein (2), A.A. Kochanov (1), ((1) Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia, (2) Obse...
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Sun 17.08.11
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Sunspot 11271 has emerged over the Sun's northeastern limb. Expand (115kb, 560 x 560) Credit: SOHO/MDI Expand (137kb, 560 x 560) Credit: SOHO/MDI
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Sun 01.08.10
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Title: Oscillation Maps in the Broadband Radio Spectrum of the 1 August 2010 Event Author: M. Karlicky, J. Rybak We search for indications of waves in the 25-2000 MHz radio spectrum of the 1 August 2010 event (SOL2010-08-01T08:57:00L075C013), where fast propagating waves in the solar corona with...
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Sun 23.07.12
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Title: The 2012 July 23 Backside Eruption: An Extreme Energetic Particle Event? Author: Nat Gopalswamy, Seiji Yashiro, Neeharika Thakur, Pertti Mäkelä, Hong Xie, Sachiko Akiyama The backside coronal mass ejection (CME) of 2012 July 23 had a short Sun to Earth shock transit time (18.5 hours). The...
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Solar Activity Cycle
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Title: Hysteresis in a Solar Activity Cycle Authors: Vinita Suyal, Awadhesh Prasad, Harinder P. Singh We analyse in situ measurements of solar wind velocity obtained by the Advanced Composition Explorer (ACE) spacecraft during the solar activity cycle 23. We calculated a robust complexity mea...
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Solar Flares
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Something New On the Sun: SDO Spots a Late Phase in Solar Flares The sun's surface dances. Giant loops of magnetised solar material burst up, twist, and fall back down. Some erupt, shooting radiation flares and particles out into space. Forced to observe this dance from afar, scientists use all the t...
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Solar astrometry
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Title: Solar astrometry: the status of art in 2011 Authors: Costantino Sigismondi Solar astrometry deals with the accurate measurement of the solar diameter, and in general with the measurement of the shape of the Sun. During the last decades several techniques have been developed to monitor the...
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September 2015 lunar eclipse
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A total lunar eclipse will take place on September 28, 2015, the second of two total lunar eclipses in 2015. Read more
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Solar eclipse, September 13, 2015
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A partial solar eclipse will occur on September 13, 2015. Read more
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Solar magnetic field reversal
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Title: Reversals of the solar dipole Authors: David Moss, Leonid L. Kitchatinov, Dmitri Sokoloff During a solar magnetic field reversal the magnetic dipole moment does not vanish, but migrates between poles, in contradiction to the predictions of mean-field dynamo theory. We try to explain thi...
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Sun 16.02.11
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Sunspot 11158 Expand (135kb, 560 x 560) Credit: SOHO/MDI
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