WebThe movement of sunspots across the face of the Sun allowed astronomers in the early 1600's to make the first estimates of the Sun's rotation period (about 27 days). In 1843 an amateur German astronomer named Samuel … Web400 year sunspot history, including the Maunder Minimum "The prediction for solar cycle 24 gave a smoothed sunspot number maximum of about 69 in the late Summer of 2013. The smoothed sunspot number reached 68.9 …

Sun activity: Quiet, but the sunspots keep coming - Earth & Sky

WebDaily and monthly sunspot number (last 13 years) Daily sunspot number (yellow), monthly mean sunspot number (blue), smoothed monthly sunspot number (red) for the last 13 years and 12-month ahead predictions of the monthly smoothed sunspot number: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/solact.html eljos mens clothing

What Will Solar Cycle 25 Look Like? NASA

Web(Daily observations of sunspots began in 1749 at the Zurich, Switzerland observatory.) One interesting aspect of solar cycles is that the sun went through a period of near zero sunspot activity from about 1645 to 1715 . … WebHistory Data Multi-year forecast of the monthly sunspot number and the monthly F10.7. Predicted values are based on the consensus of the Solar Cycle 24 Prediction Panel. … Web400 year history of sunspot numbers. A proposed list of historical Grand minima of solar activity [7] includes also Grand minima ca. 690 AD, 360 BC, 770 BC, 1390 BC, 2860 BC, 3340 BC, 3500 BC, 3630 BC, 3940 BC, 4230 BC, 4330 BC, 5260 BC, 5460 BC, 5620 BC, 5710 BC, 5990 BC, 6220 BC, 6400 BC, 7040 BC, 7310 BC, 7520 BC, 8220 BC, 9170 BC. el joven lincoln filmaffinity