Ever since Samuel Heinrich Schwabe, a German astronomer, first noted in 1843 that sunspots burgeon and wane over a roughly 11-year cycle, scientists have carefully watched the Suns activity. In the latest lull, the Sun should have reached its calmest, least pockmarked state last fall.
Indeed, last year marked the blankest year of the Sun in the last half-century 266 days with not a single sunspot visible from Earth. Then, in the first four months of 2009, the Sun became even more blank, the pace of sunspots slowing more.
Its been as dead as a doornail, David Hathaway, a solar physicist at NASAs Marshall Space Flight Center in Huntsville, Ala., said a couple of months ago.
The Sun perked up in June and July, with a sizeable clump of 20 sunspots earlier this month.
Now it is blank again, consistent with expectations that this solar cycle will be smaller and calmer, and the maximum of activity, expected to arrive in May 2013 will not be all that maximum.
http://www.nytimes.com/2009/07/21/s...bl&ex=1248408000&en=26edfbfbe564636f&ei=5087
Indeed, last year marked the blankest year of the Sun in the last half-century 266 days with not a single sunspot visible from Earth. Then, in the first four months of 2009, the Sun became even more blank, the pace of sunspots slowing more.
Its been as dead as a doornail, David Hathaway, a solar physicist at NASAs Marshall Space Flight Center in Huntsville, Ala., said a couple of months ago.
The Sun perked up in June and July, with a sizeable clump of 20 sunspots earlier this month.
Now it is blank again, consistent with expectations that this solar cycle will be smaller and calmer, and the maximum of activity, expected to arrive in May 2013 will not be all that maximum.
http://www.nytimes.com/2009/07/21/s...bl&ex=1248408000&en=26edfbfbe564636f&ei=5087