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September 26, 2007
Periodic comet P/2007 R5 (SOHO), seen with SOHO's Large Angle and Spectrometric Coronagraph camera. A yellow box has been added to the picture to highlight the tiny comet, which appears as a white dot in the center.
SOHO Mission Discovers Rare Comet (NASA Feature)

The Solar and Heliospheric Observatory (SOHO) has discovered a rare periodic comet. SOHO has already discovered more than 1,350 comets during its mission, but this is the first time one of its discoveries officially has been designated periodic.


Image Credit: ESA/NASA

September 18, 2007
A magnetic map of emerging sunspot 10926 recorded by Hinode in Dec. 2006.
Magnetic Trilobite (NASA Feature)

"We've never seen anything quite like it," says solar physicist Lika Guhathakurta from NASA headquarters.Last week she sat in an audience of nearly two hundred colleagues at the "Living with a Star" workshop in Boulder, Colorado, and watched in amazement as Saku Tsuneta of Japan played a movie of sunspot 10926 breaking through the turbulent surface of the sun. Before their very eyes an object as big as a planet materialized, and no one was prepared for the form it took.


Image credit: JAXA

September 14, 2007
When powerful solar storms produced a surge of NOx, in the Southern Hemisphere, ozone was both boosted (yellow in the diagram) and destroyed (blue).
Noxious Activity (

Scientists attending the Living With a Star workshop in Boulder, Colorado, learned yesterday that solar storms can have long-lasting effects on Earth's ozone layer. Charles Jackman of the Goddard Space Flight Center reported that solar protons hitting Earth in July 2000 altered the chemistry of the upper atmosphere, resulting in "huge enhancements (>100%) in middle stratospheric NOx."


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