![]() |
This image is from November 7, 2011 and it shows the large active region 1339. On the lower right corner you have a size comparison between Earth, Jupiter and the AR 1339 |
![]() |
This is AR1339 again on November 8, 2011. Look at this amazing image! |
The evidence for sunspot magnetism was their emitted light. Glowing gases emit light in narrowly defined wavelengths (i.e. colors), a different set for each substance. In 1897, however, Pieter Zeeman found that when such light was emitted from the region of a strong magnetic field, the emission split into slightly different wavelengths, with a separation that increased with the strength of the field. The colors of the light emitted from sunspots were "split up" in just this way.
The method was later improved by Babcock and others, allowing astronomers to observe not only the magnetic field of sunspots but also the weak fields near the Sun's poles. It turned out that the Sun has a polar field somewhat like the Earth's, but that it reverses its polarity during each 11-year cycle.
Sunspots have also led us to a better understanding of the Earth's own magnetic field. The face of the Sun consists of ionized hot gas ("plasma"), hot enough to conduct electricity. Sunspot fields were evidently produced by electric currents, and it was well known that such currents could be generated by a "dynamo process," by the motion of an electric conductor (e.g. the flow of solar plasma) through a magnetic field.
In 1919 Sir Joseph Larmor proposed that the fields of sunspots were due to such dynamo currents. He suggested that a closed chain of cause-and-effect existed, in which the field created by these currents was also the field which made them possible, the field in which the plasma's motion generated the required currents. Many features of sunspots remain a mystery, but Larmor's idea opened an era of new understanding of magnetic processes in the Earth's core.
Sunspots are caused by the uneven rotation of the Sun, the equator rotating faster than the polar regions. That stretches out magnetic field lines, crowding them together and making their magnetic field stronger. Strong magnetic field (under the surface) pushes away the solar gas, which therefore gets less dense, so that regions of strong field tend to float up to the top, the way oil floats to the surface of water. Where it breaks the surface, sunspots occur.
![]() |
The solar surface and interior rotation rate, where red regions represent areas of slightly faster than average rotation while areas in blue show slower rotational rates. Credit: NSO |
Credit: NASA SDO / GSFC & NSO
The sunspots are definitely so amazing to see here. So much to learn about what happens here. The video is so good to see here. Auto Insurance Blog
ReplyDeleteIt took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.
ReplyDeleterolex watches, jimmy choo shoes, mont blanc pens, chi flat iron, ugg, soccer jerseys, hollister clothing, moncler outlet, herve leger, ghd, moncler, soccer shoes, north face outlet, p90x workout, canada goose outlet, instyler ionic styler, canada goose pas cher, iphone 6 case, baseball bats, bottega veneta, insanity workout, ugg soldes, babyliss pro, mcm handbags, nfl jerseys, new balance outlet, reebok outlet, canada goose outlet, asics shoes, uggs outlet, giuseppe zanotti, lululemon outlet, uggs on sale, timberland shoes, canada goose outlet, north face jackets, ugg outlet, marc jacobs outlet, beats headphones, celine handbags, canada goose uk, ferragamo shoes, wedding dresses, canada goose, moncler, valentino shoes, moncler, nike air max, ugg boots, birkin bag
ReplyDeleteThis is great, you are good, i like your post and i still waiting our next post!
ReplyDeleteMencicipi memek gurih tante Milla
ferragamo belt
ReplyDeletemoncler
off white hoodie
curry 4
kobe shoes
nike air max shoes
bape hoodie
fitflops sale clearance
hermes belt
supreme
xiaofang20191211
pg 1
ReplyDeleteyeezy boost 350 v2
nike off white
curry shoes
cheap jordans
golden goose
supreme new york
golden goose sneakers
yeezy 350
jordan 6