The Sun is always changing and the Solar Dynamics Observatory is continuously watching. SDO keeps a 24-hour eye on the entire disk of the Sun. NASA released a movie of some of SDO‘s best sightings of it’s fourth year watching the Sun, including massive solar explosions and giant sunspot shows.
SDO monitors the Sun in 10 different wavelengths, each of which highlights a different temperature of solar material. Different temperatures show specific structures on the sun such as solar flares (giant explosions of light and x-rays) or coronal loops, which are streams of solar material traveling along looping magnetic field lines. This movie shows examples of both, as well prominence eruptions, masses of solar material leaping off the Sun. The movie also shows a 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.[youtube http://www.youtube.com/watch?v=NAg4qXsk99c]
Video Credit: NASA