[Propagation+Space Weather] See a Year's Worth of the Sun - Timelapse of 2015 (SDO)

[Tomas Hood <nw7us.heliophile@gmail.com>]

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This cool video ( in ultra-high definition 3840x2160 - 4k on YouTube at https://www.youtube.com/watch?v=HgP0e1VHBxc ) shows the Sun during the entire year, 2015. The video captures the Sun in the 171-angstrom wavelength of extreme ultraviolet light. Our naked, unaided eyes cannot see this, but this movie uses false-colorization (yellow/gold) so that we can watch in high definition.

The movie covers a time period of January 2, 2015 to January 28, 2016 at a cadence of one frame every hour, or 24 frames per day. This timelapse is repeated with narration by solar scientist Nicholeen Viall and contains close-ups and annotations. The 171-angstrom light highlights material around 600,000 Kelvin and shows features in the upper transition region and quiet corona of the sun.

The sun is always changing and NASA's Solar Dynamics Observatory is always watching. Launched on Feb. 11, 2010, SDO keeps a 24-hour eye on the entire disk of the sun, with a prime view of the graceful dance of solar material coursing through the sun's atmosphere, the corona. SDO's sixth year in orbit was no exception. This video shows that entire sixth year--from Jan. 1, 2015 to Jan. 28, 2016 as one time-lapse sequence. Each frame represents 1 hour.

SDO's Atmospheric Imaging Assembly (AIA) captures a shot of the sun every 12 seconds in 10 different wavelengths. The images shown here are based on a wavelength of 171 angstroms, which is in the extreme ultraviolet range and shows solar material at around 600,000 Kelvin (about 1 million degrees F.) In this wavelength it is easy to see the sun's 25-day rotation.

During the course of the video, the sun subtly increases and decreases in apparent size. This is because the distance between the SDO spacecraft and the sun varies over time. The image is, however, remarkably consistent and stable despite the fact that SDO orbits Earth at 6,876 mph and the Earth orbits the sun at 67,062 miles per hour.

Scientists study these images to better understand the complex electromagnetic system causing the constant movement on the sun, which can ultimately have an effect closer to Earth, too: Flares and another type of solar explosion called coronal mass ejections can sometimes disrupt technology in space. Moreover, studying our closest star is one way of learning about other stars in the galaxy. NASA's Goddard Space Flight Center in Greenbelt, Maryland. built, operates, and manages the SDO spacecraft for NASA's Science Mission Directorate in Washington, D.C.

Please share this video... share the love of this amazing star that gives us life on the shortwave bands!

And, if you are on Reddit, would you please up-vote my post (the link attached to this posting)? I appreciate you taking the time to vote the post "UP" on Reddit.  I appreciate you watching and enjoying the video, too.

https://www.reddit.com/r/videos/comments/4at3dn/an_intimate_uhd_4k_view_of_the_sun_every_day_of/?ref=share&ref_source=link

Be sure to share, if you did up-vote and liked the video, okay?

Many many thanks!

--

-= Keep up with current space weather: http://sunspotwatch.com/ =-

Tomas David Hood (Amateur Radio, NW7US)  --  Home page: http://NW7US.us/
 
Contributing editor, propagation and space weather columns in 

  "CQ Amateur Radio Magazine", and in 

     "The Spectrum Monitor" ( http://www.thespectrummonitor.com/ )

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Linux User #32405 - Since 1996

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