[bars] Ten years of the solar cycle reduced to 60 minutes

[Marla A. Wallace]

Thanks, Bruce.

That's the sun as no one has ever experienced it.  The light used to take those pictures has a wavelength about 30 times shorter than violet visible light, comparable to the difference between six meters versus 160 meters.

Fun Solar Facts:
1.  It takes the sun about a month to rotate on its axis, so the features shown in the movie take about two weeks to go from one side of the solar disc to the other.
2. The sunspot cycle is about eleven years and we are currently just about at minimum, so the whole movie goes from a minimum, through a maximum and back to a minimum.
3.  As the sunspot cycle goes to maximum, the sunspots tend to occur at progressively lower latitudes.

Me ke aloha
-- Marla

On July 8, 2020, at 14:32, Bruce Anderson <w1lus at hotmail.com> wrote:

P {margin-top:0;margin-bottom:0;} 

You can see ten years of the solar cycle in this video. The variation from maximum to minimum is amazing.


Bruce

W1LUS


NASA's Solar Dynamics Observatory has been consistently taking pictures of the sun -- one every three-quarters of a second -- across a number of different wavelengths. Images of the extreme ultraviolet wavelength of 17.1 nanometers reveals the sun's corona, and hourly corona pictures have been combined into a time-lapse movie of the last decade of solar activity, condensed into about 60 minutes. 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.w1hh.org/pipermail/bars_w1hh.org/attachments/20200708/f40e61c6/attachment.htm>