|
Credit & Copyright: Greg Piepol
Explanation:
A new cycle has begun on our Sun.
Over the past year, the Sun's
magnetic
field has reset and now a new
11 year period is beginning.
Pictured above in a
specific color of light emitted
by
hydrogen is sunspot 10982,
one of the first sunspots of the new solar cycle.
The two dark lines visible just above and to either side of the bright sunspot are
cool
filaments held aloft
by the Sun's magnetic field.
Hot and cold regions are shown as regions of relative light and dark,
respectively.
A solar cycle
is caused by the changing magnetic field, 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.
Of course,
tomorrow's
annular solar eclipse is
mostly for penguins.
|
January February March April May June July August September October November December |
| ||||||||||||||||||||||||||||||||||||||||||||||||
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: sunspot - solar cycle
Publications with words: sunspot - solar cycle
See also: