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solar filaments

24 June 2015

    Still there. The above is a image of solar filaments, one taken on May 28th and the other in June, a month later. The filaments have gone round the sun in one revolution and show signes of change.

Meanwhile, at http://wattsupwiththat.com/2015/06/22/historical-sunspot-numbers-are-abo… … which has got some commenters at the blog in a kerfuffle. Solar physicist Leif Svalgaard explains what it is all about. The idea is to raise the way the entire sunspot number time series to the level of modern sunspot counts, thus clearing up an issue that has caused problems over recent years. Obviously, modern telescopes can see much more activity on the sun than telescopes a couple of 100 years ago – but it is not as simple as that. The link explains what is going to occur.

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