Mysterious disappearance of sunspots the sun's surface has more than 20 days.

World Scientific reports [tech.] News: Astronomical Society of Jiangsu Province from the observations show that: the past month seems to surface of the sun's sunspot all invisible, and one of April 1 to 24 the number of sunspots are zero, .continuous surface of the sun without sunspots number of days to more than 20 days. .<P> Astronomical Society of Jiangsu Province, said Deputy Secretary-General Yan Jiarong, sunspots are the sun appeared on the huge ball swirling layer of air, the temperature lower than the photosphere is about 1000 ℃, brightness darker than the photosphere some form .a relatively dim spots, so people call it the image of "sunspots." .</ P> <P> China is recognized as the earliest recorded observations of sunspots in the country. ."Han Five" recorded river level there first year of March EMPEROR "Sunrise Yellow, big, black gas such as money, Habitat Day Central." .The records show that our ancestors 800 years earlier than the Europeans discovered sunspots. .</ P> <P> general, the large sunspots are generated, the surface will stay ten days in Japan, black sub-group of two or three days may be gone, but their position on the surface there will be .subtle changes. .</ P> <P> astronomers study concluded that sunspots from the maximum (or minimum) of the year to the next maximum (or minimum) of the year, about 11 years apart. .In other words, the sunspot activity cycle was about 11 years, which is the solar activity cycle. .The sunspot maximum years astronomers known as the "solar maximum year," the year of sunspot minimum called the "solar quiet years." .</ P> <P> Astronomical Society of Jiangsu Province in April observed sunspots since records: In addition to April 5, 6, no record of the rainy days, the April 1 -24 days for the sunspot numbers are .zero. .</ P> <P> Yan Jiarong said the Japanese side sunspots disappeared, indicating the most recent period, solar activity is relatively "weak", entered a long period of the "trough." .This year a "quiet solar years", so as long as 20 days of no sunspots, the phenomenon is normal. .</ P> </ p>.