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Tech journalist since the dark ages. Windows Secrets, LangaList newsletter, Windows Magazine (NetGuide, Home PC), Byte, Popular Computing, yadda yadda yadda. Google me, if it matters.

This feed is mostly personal interest; it's NOT my professional writing. There's tech here, yes, but also lots of general science and some politics and weird humor thrown in.

Monday, November 14, 2011

Almost like a Van Gogh detail

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Solar granules: Granules on the photosphere of the Sun are caused by convection currents (thermal columns, Bénard cells) of plasma within the Sun's convective zone. The grainy appearance of the solar photosphere is produced by the tops of these convective cells and is called granulation.

A typical granule has a diameter on the order of 1,000 kilometers and lasts 8 to 20 minutes before dissipating.

http://en.wikipedia.org/wiki/Granule_(solar_physics)