The Sun is the star at the center of our solar system. It is designated as spectral class G2V, a yellow dwarf because its radiation peaks at the yellow portion of the visible spectrum. In this picture several prominent Sunspots can be seen near the upper left limb. Another sunspot is located about halfway from the center toward the 2-o'clock position on the limb.
More information about the Sun can be found at Wikipedia Sun
This image is a 1/80s exposure with a Nikon D90 through a William Optics FLT110 4.3" f/7 refractor with a solar filter taken on 15 January 2012.
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