the star that is the center of our solar system
the visible surface of the sun
the sun's atmosphere
a dark spot on the photosphere of the sun
a brief burst of energy from the sun's photosphere
a fast-moving stream of particles thrown into space by solar flares
the spinning of the Earth on its axis
the imaginary line that passes through the center of the Earth from the North Pole to the South pole
the time it takes the Earth to make one complete trip around the sun
the path on which a planet travels around the sun
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