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Internal Layers of the Sun
24" x 18"
Photographic Print

Internal layers of the Sun, illustration. At the Sun's core (far left) hydrogen atoms undergo nuclear fusion, producing helium atoms and releasing heat and light energy as photons. These radiate outwards through the inner region (radiative zone) to the outer convection zone layer. Here, solar plasma rises in thermal columns to the visible surface (photosphere). Solar prominences (filaments) are shown erupting from the Sun's surface.Claus Lunau/Science Photo Library