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ACE Studies Solar "Sneezes"
News story originally written on December 14, 1998

Scientists have used the Advanced Composition Explorer (ACE) to measure the temperature of tiny "sneezes" of solar material called impulsive solar flares.

"These flares are relatively modest, compared to a typical solar flare. Before ACE, we had to average over a group of them to get a temperature estimate," said Dr. Joseph Mazur of the Aerospace Corporation, a contributor to the research.

The Solar Energetic Particle Ionic Charge Analyzer (SEPICA) measures the electrical charge on atoms. Electrons are stripped from atoms at high temperatures. By measuring the number of missing electrons (the charge), SEPICA can determine the temperature of the flare that created the particles.


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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA