by APOD Robot » Wed Mar 12, 2014 4:05 am
The Sun Rotating
Explanation: Does the Sun change as it rotates? Yes, and the changes can vary from subtle to dramatic. In the
above time-lapse sequences, our Sun -- as imaged by
NASA's
Solar Dynamics Observatory -- is shown rotating though the entire month of January. In the large image on the left, the solar
chromosphere is depicted in
ultraviolet light, while the smaller and lighter image to its upper right simultaneously shows the more familiar solar
photosphere in visible light. The rest of the inset six Sun images highlight
X-ray emission by relatively rare iron atoms located at different heights of the
corona, all
false-colored to accentuate differences. The Sun takes just under a month to
rotate completely -- rotating fastest at the equator. A large and active
sunspot region rotates into view soon after the video starts. Subtle effects include changes in
surface texture and the shapes of active regions. Dramatic effects include numerous flashes in active regions, and fluttering and
erupting prominences visible all around the Sun's edge. This year our Sun is near its
Solar maximum activity of its 11-year magnetic cycle. As
the video ends, the same large and active sunspot region previously mentioned rotates back into view, this time
looking differently.
[/b]
[url=http://apod.nasa.gov/apod/ap140312.html][img]http://apod.nasa.gov/apod/calendar/S_140312.jpg[/img] [size=150]The Sun Rotating[/size][/url]
[b] Explanation: [/b] Does the Sun change as it rotates? Yes, and the changes can vary from subtle to dramatic. In the [url=https://www.youtube.com/watch?v=2WRgXvdasm0]above time-lapse sequences[/url], our Sun -- as imaged by [url=http://www.nasa.gov/]NASA[/url]'s [url=http://sdo.gsfc.nasa.gov/mission/]Solar Dynamics Observatory[/url] -- is shown rotating though the entire month of January. In the large image on the left, the solar [url=http://solar-heliospheric.engin.umich.edu/hjenning/Chromosphere.html]chromosphere[/url] is depicted in [url=http://missionscience.nasa.gov/ems/10_ultravioletwaves.html]ultraviolet[/url] light, while the smaller and lighter image to its upper right simultaneously shows the more familiar solar [url=http://solarscience.msfc.nasa.gov/surface.shtml]photosphere[/url] in visible light. The rest of the inset six Sun images highlight [url=http://missionscience.nasa.gov/ems/11_xrays.html]X-ray emission[/url] by relatively rare iron atoms located at different heights of the [url=http://apod.nasa.gov/apod/ap090726.html]corona[/url], all [url=http://adsoftheworld.com/files/Blue_Cat-No_Mac-big.jpg]false-colored[/url] to accentuate differences. The Sun takes just under a month to [url=http://en.wikipedia.org/wiki/Solar_rotation]rotate[/url] completely -- rotating fastest at the equator. A large and active [url=http://apod.nasa.gov/apod/ap031027.html]sunspot region[/url] rotates into view soon after the video starts. Subtle effects include changes in [url=http://apod.nasa.gov/apod/ap090405.html]surface texture[/url] and the shapes of active regions. Dramatic effects include numerous flashes in active regions, and fluttering and [url=http://apod.nasa.gov/apod/ap100510.html]erupting prominence[/url]s visible all around the Sun's edge. This year our Sun is near its [url=http://en.wikipedia.org/wiki/Solar_maximum]Solar maximum[/url] activity of its 11-year magnetic cycle. As [url=https://plus.google.com/110701307803962595019/posts/21dVg5ATA67]the video[/url] ends, the same large and active sunspot region previously mentioned rotates back into view, this time [url=http://spaceweather.com/]looking differently[/url].
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