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The Solar Core - Windows to the Universe

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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 by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF