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First complete image of the far side of the sun taken on June 1, 2011. Credit: NASA/STEREO

NASA asked the world to vote on their biggest accomplishment of 2011... and the results are in.

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An artist's conception of one of the Solar Terrestrial Relations Observatory (STEREO) spacecraft. The two observatories currently lie on either side of the sun, providing views of the entire sun simultaneously. Credit: NASA/Goddard With 492 votes, the winner is "Twin Solar Spacecraft Take First Complete Image of Far Side of Sun" referring to an image captured by NASA's two Solar Terrestrial Relations Observatory (STEREO) spacecraft. The STEREO satellites are currently in orbit around the sun and separated such that each has a view of the opposite sides of our closest star. Together the two observatories captured the first simultaneous images of the far side of the sun in June of 2011.

For additional information about STEREO's historic images, view:

http://www.nasa.gov/mission_pages/stereo/news/farside-060111.html

For additional results of the poll, visit:

http://www.nasa.gov/news/11_YIR_poll.html

For more about the STEREO mission, visit:

http://www.nasa.gov/stereo