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Thursday, July 24, 2014

Our neighbor star on June 4th, 2014

Image: The Sun on June 4th, 2014

Many large  sunspots indicate high solar activity. A couple of them were visible in the photosphere of our neighbor star on June 4th, 2014. The photosphere is the lowest layer of the Sun's atmosphere. It is 400 km thick and its temperature varies from 7500°K to 4500°K. Sunspots and granules are visible through an amateur telescope equipped with special safety film [see also Baader Astrosolar (R)], which is mandatory for Sun observations and photography.

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