Ultra-High Def 4K Video: Timelapse of Sun, 2015

Discussion in 'Ham Radio Discussions' started by NW7US, Mar 18, 2016.

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  1. NW7US

    NW7US Premium Subscriber QRZ Page

    This cool video ( in ultra-high definition 3840x2160 - 4k on YouTube ) 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.

    Thanks for sharing, voting, and watching!
  2. KB9UWU

    KB9UWU Ham Member QRZ Page

    1920x1200 monitor here, no joy...
  3. NW7US

    NW7US Premium Subscriber QRZ Page

    Um... you can view it in any lower resolution that works in your situation. YouTube makes a number of lower rendering resolutions, and will adapt it to what your system supports. Just click on the video and enjoy.
  4. KB9UWU

    KB9UWU Ham Member QRZ Page

    I meant, most people can't actually view 4k videos in 4k resolution... carry on.
  5. NW7US

    NW7US Premium Subscriber QRZ Page

    Yeah, that seems to be the reality at the moment. I am working on obtaining a 4K-capable 60-inch TV, by mid-summer. It will be pretty cool to view the Sun in such high resolution. The Sun is amazingly beautiful, when we view it in Extreme Ultraviolet (EUV), via tools such as are about SDO, that translate that invisible wavelength to a color we can see. Did you watch this video? A whole year of the Sun, rotating once every approximate 22 days.
  6. KB9UWU

    KB9UWU Ham Member QRZ Page

  7. NW7US

    NW7US Premium Subscriber QRZ Page

    Cool. I run http://SunSpotWatch.com -- I started that in the late 1990s, one of the first on the web. I write the propagation and space weather column in CQ Amateur Radio magazine, and also in The Spectrum Monitor. I first started studying the Sun back in the early 1980s. It never ceases to amaze me.

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