Explanation: Every eleven years, our Sun goes through a solar cycle. A complete solar cycle has now been imaged by the sun-orbiting SOHO spacecraft, celebrating the 12th anniversary of its launch yesterday. A solar cycle is caused by the changing magnetic field of the Sun, and varies from solar maximum, when sunspot, coronal mass ejection, and flare phenomena are most frequent, to solar minimum, when such activity is relatively infrequent. Solar minimums occurred in 1996 and 2007, while the last solar maximum occurred in 2001 Pictured above is a SOHO image of the Sun in extreme ultraviolet light for each year of the last solar cycle, with images picked to illustrate the relative activity of the Sun.

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Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr'

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: solar cycle - solar maximum - SOHO - solnechnyi cikl - maksimum solnechnoi aktivnosti Publikacii so slovami: solar cycle - solar maximum - SOHO - solnechnyi cikl - maksimum solnechnoi aktivnosti
Sm. takzhe: Solnechnyi minimum protiv solnechnogo maksimuma Solnechnyi protuberanec: vid s SOHO Solnechnyi cikl 25 nachinaetsya Fevral' bez solnechnyh pyaten Aktivnye protuberancy na spokoinom Solnce Solnechnaya korona vo vremya zatmeniya s Zemli i iz Kosmosa Pryamaya translyaciya severnogo siyaniya iz Grenlandii v ramkah proekta GLORIA Vse publikacii na tu zhe temu >>