HINODE continuously tracked the same sunspot
with high spatial resolution for several days.
appear in two bands that sandwich the Sun's equator.
are useful and important to study not only because they provide information about the inner workings of our host star; understanding them is significant also because they are an important factor in space weather.
Revisiting the Sunspot
Number: A 400-Year Perspective on the Solar Cycle, Space Sciences Series of ISSI 53, The Solar Activity Cycle: Physical Causes and Consequences, A.
The Solar Terrestrial Relations Observatory (STEREO), launched by NASA in 2006, consists of two identical satellites orbiting the Sun, allowing stereoscopic imaging of sunspots
and coronal mass ejections.
can be the size of Earth or as big as Jupiter.
AR1835 S09[degrees]/011[degrees] was a single Hsx sunspot
on the SE limb on Aug 24 and just over the limb on Aug 25 & 26.
This direct association of sunspot
and facular matter has recently been re-emphasized as a result of studying large flares on the solar surface .
Unbeknown to Europeans, Chinese astronomers had discovered sunspots
more than a millennium earlier.
Matt Penn of the National Solar Observatory, another study co-author, said sunspot
magnetic fields have been steadily decreasing in strength since 1998.
Scientists say the sun has been relatively quiet over the past two winters - as Irish weather-watchers know - even though it is supposed to be approaching a peak in its 11-year sunspot
activity runs on an 11-year cycle from many hundreds of sunspots
to none at all.
Some studies indicate that sunspot
activity overall has doubled in the last century.
product that AeroLEDs sent to us has 16 LEDs arranged in a circular lens assembly.
During 1947, a sunspot
of about 130,000ml diameter was observed.