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NASA Video Recaps SDO's Year Four
February 11, 2014

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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 fourth year in orbit was no exception: NASA is releasing a movie of some of SDO's best sightings of the year, including massive solar explosions and giant sunspot shows.

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SDO captures images of the sun in 10 different wavelengths, each of which helps highlight a different temperature of solar material. Different temperatures can, in turn, show specific structures on the sun such as solar flares, which are giant explosions of light and x-rays, or coronal loops, which are streams of solar material traveling up and down looping magnetic field lines. The movie shows examples of both, as well as what's called prominence eruptions, when masses of solar material leap off the sun. The movie also shows a giant sunspot group on the solar surface. This sunspot, a magnetically strong and complex region appearing in mid-January 2014, was one of the largest in nine years.

The movie runs 3 minutes and 44 seconds and it was created at NASA's Goddard Space Flight Center in Greenbelt, Md.

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.

Related Links:

› NASA's SDO website

Karen C. Fox
NASA's Goddard Space Flight Center, Greenbelt, Md.

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Massive solar flares, graceful eruptions of solar material, and an enormous sunspot make up some of the imagery captured by NASA's Solar Dynamics Observatory during its fourth year in orbit.
Image Credit: 
NASA/SDO/Goddard Space Flight Center
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Composite of the sun from Feb 2013 to Feb 2014 as seen by SDO.
This image is a composite of 25 separate images spanning the period of February 11, 2013 to February 11, 2014. It uses the SDO AIA wavelength of 304 Angstroms and reveals the zones on the sun where active regions and associated eruptions most commonly occur during Solar Maximum.
Image Credit: 
NASA's Goddard Space Flight Center/SDO/S. Wiessinger
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Page Last Updated: February 11th, 2014
Page Editor: Jim Wilson