File:Snapshots of -One Location- on the Sun Over Five Years -Hinode XRT-.webm

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Original file(WebM audio/video file, VP8/Vorbis, length 50 s, 720 × 720 pixels, 714 kbps overall)

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Description

Today's movie attempts to follow a fixed location on the sun as it comes back around after each rotation period. Each frame advances time by one Carrington rotation period, around 27.3 days. Following one spot on the sun is a tricky endeavor because the sun is not a solid body and is therefore subject to differential rotation, meaning that different latitudes have different rotation rates. The polar regions of the sun rotate fully about once every 34 days, while material at the equator takes only about 25 days. Richard Carrington used low latitude sunspots to determine the rotation period of the sun and came up with a sidereal period of 25.38 days, which, because the Earth is orbiting the Sun, appears to us as 27.28 days. In this movie, several active regions can be observed to appear, linger for a rotation or two, and then dissipate. But this perspective is perhaps even more interesting for illuminating the dynamic nature of coronal holes, the dark regions of cooler and lower-density plasma, which can be seen here morphing and migrating throughout the corona.

Visit us at http://xrt.cfa.harvard.edu/ and view the original post at http://xrt.cfa.harvard.edu/xpow/20111209.html

Questions and comments welcome at xrtpow "at" gmail "dot" com

Hinode is a Japanese mission developed and launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC (UK) as international partners. It is operated by these agencies in co-operation with ESA and the NSC (Norway).

Date
Source http://www.youtube.com/watch?v=qTKs7L8QM2E
Author https://www.youtube.com/user/xrtpow

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This file, which was originally posted to http://www.youtube.com/watch?v=qTKs7L8QM2E, was reviewed on by the administrator or reviewer McZusatz, who confirmed that it was available there under the stated license on that date.

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current14:24, 23 June 201350 s, 720 × 720 (4.25 MB)YtUPt (talk | contribs)Imported from http://www.youtube.com/watch?v=qTKs7L8QM2E
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