[decimon]

Solar spins ping.

[OrioleFan]

bump for after work

[SunkenCiv]

Hey, nice catch decimon!

Anyone else noticed what a great month or so it has been for C topics? And V topics, for that matter... :')

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[wideminded]

a phenomenon that slowly appeared and disappeared every 27 days, the length of a single full rotation of the sun.

The rotation period of the sun varies by latitude. Perhaps 27 days is the average.

[wideminded]

"Solar rotation is arbitrarily taken to be 27.2753 days for the purpose of Carrington rotations. ...

"Richard Christopher Carrington determined the solar rotation rate from low latitude sunspots in the 1850s and arrived at 25.38 days for the sidereal rotation period. Sidereal rotation is measured relative to the stars, but because the Earth is orbiting the Sun, we see this period as 27.2753 days."

- Wikipedia