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Direct observation of sunspots has, more or less, been going on continuously since they were first observed in the seventeenth century. So, you can imagine the puzzled expressions on the faces of astronomers the world over when the phenomena all-but disappeared from view for a couple of years recently. Now, research sponsored by NASA and the government of India has produced the first computer model that explains the prolonged cyclic minima during 2008 - 2009. The simulations suggest that plasma currents deep inside the sun interfered with the formation of sunspots... Continue Reading New model explains mystery of missing sunspots
Tags: Astronomy, NASA, Physics, Solar, Sun
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The International Space Station and a just-undocked space shuttle Discovery transit the surface of the Sun, appearing near an active spot region, 1166. Credit: Catalin Fus. Used by permission.
Amateur astronomer Catalin Fus from Poland has captured one of the most amazing images I’ve ever seen – and his timing was impeccable. On March 7th at 13:05:49 UTC, just after space shuttle Discovery had undocked from the International Space Station, the two ships flew in formation directly in front of the Sun, as seen from Fus’ location just outside of Krakow. With his solar-filtered telescope focused on active sunspot region 1166, he found there were a couple extra spots in his image – Discovery and the ISS. Given that this was Discovery’s final mission in space and final visit to the ISS, this image has historical significance, as well as just being absolutely fantastic. Keep in mind that transits like this last just over a half a second.
He used the following equipment:
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Read the rest of Absolutely Amazing: ISS, Discovery Transit Sun Near Active Sunspot Region (79 words)
© nancy for Universe Today, 2011. | Permalink | 3 comments | Add to del.icio.us
Post tags: astrophotography, Space Shuttle, sun
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Image credit: NASA/Goddard/SDO-AIA/JAXA/Hinode-XRT; Artistic rendering: Cygnus-Kolkata/William T. Bridgman; Conceptualization and simulation data: Dibyendu Nandy, Andres Munoz-Jaramillo and Petrus C.H. Martens.
The long lull in sunspots at the end of Solar Cycle 23 wasn’t just fodder for global cooling predictions — it gave solar physicists plenty to study. And a new computer analysis may have come up with a fairly simple explanation for the sun’s odd quiet. Lead author Dibyendu Nandy, of the Indian Institute of Science Education and Research in Kolkata, and his colleagues report in Nature today that the long string of sunspot-free days between solar cycles 23 and 24 may directly correlate with the speed of north-south flow of plasma toward the sun’s equator. Their collage, above, shows magnetic fields in the interior of the Sun simulated using a solar dynamo model (center) and the observed solar corona at two different phases of solar activity: A quiescent phase during the recent, unusually long minimum, at right, and a comparatively active phase following the minimum, at left.
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Read the rest of New Study: Sun’s Deep Physics Explain Sunspot-Free Days (383 words)
© anne for Universe Today, 2011. | Permalink | No comment | Add to del.icio.us
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Sunspot 1164 - Credit: John Chumack
For many of us, this is the first break in the weather we’ve seen for quite some time. Of course, when opportunity knocks, you’ve got to be there to open the door… and today John Chumack took the opportunity to point his Baader solar filter film equipped 10″ SCT and Canon Rebel camera the Sun’s way… (...)
Read the rest of What A Beautiful Day For A Sunspot (258 words)
© tammy for Universe Today, 2011. | Permalink | No comment | Add to del.icio.us
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