Bright Points on the Quiet Sun
http://apod.nasa.gov/apod/ap100416.html
This is a picture of granules on the Sun's solar surface. These granules are caused by convection currents of plasma from the convection zone of the Sun. The center of each granule is the top of the rising column of plasma; surrounding each granule is a darker area of less hot descending plasma. The light spots in these darker areas are caused by high-density magnetic fields that create holes into the deeper, hotter areas.
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