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An artist's picture of the solar interior. Energy is generated in the solar core
NASA

The Solar Core

The solar core is made up of an extremely hot and dense gas (in the plasma state). Despite a density of 160,000 Kg/m3, the temperature of 15 million kelvins (27 million degrees Faranheit) prevents the core from reaching the solid state.

The core is the region where the energy of the Sun is produced. The density and temperature are such that nuclear fusion reactions can take place: these reactions release energy both in the form of electromagnetic energy (gamma rays) and particles (in particular neutrinos). Despite the reactions, the Sun's core is a very dark place!

Last modified May 10, 2010 by Randy Russell.

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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