Posted in Solar Observations, Solar Observations 2010 Tags: active regions, ETX70-AT, faculae, full disk, NOAA 11131, NOAA 11133, NOAA 11135, solar disk, solar sketches, Sun, sunspots, white light
Posted in Solar Observations, Solar Observations 2005 Tags: charcoal, ETX70-AT, faculae, NOAA 1037, NOAA 10822, NOAA 10835, penumbrae, solar projection sketching, solar sketches, sunspots, umbrae
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PCW Memorial Observatory - Erika Rix 