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

Scientists working with the Advanced Composition Explorer (ACE) have been able to measure the temperature of tiny solar "sneezes". The sneezes are smaller than solar flares and are called impulsive solar flares.

The Solar Energetic Particle Ionic Charge Analyzer (SEPICA) measures the electrical charge on atoms. At really high temperatures, electrons can be stripped from atoms. The higher the temperature is, the more electrons will be stripped. SEPICA can use the atoms' electrical charge to calculate the temperature of the flare that produced them.

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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