NASA
30th December 2015, 15:30
http://solarsystem.nasa.gov/images/news/2015-P07524_319.jpg (http://solarsystem.nasa.gov/news/2015/12/30/oak-ridge-national-laboratory-achieves-milestone-with-plutonium-238-sample)30 Dec 2015 - Oak Ridge National Laboratory Achieves Milestone With Plutonium-238 Sample
By producing 50 grams of plutonium-238, Oak Ridge National Laboratory researchers have demonstrated the nation's ability to provide a valuable energy source for deep space missions.
More... (http://solarsystem.nasa.gov/news/2015/12/30/oak-ridge-national-laboratory-achieves-milestone-with-plutonium-238-sample)
By producing 50 grams of plutonium-238, Oak Ridge National Laboratory researchers have demonstrated the nation's ability to provide a valuable energy source for deep space missions.
More... (http://solarsystem.nasa.gov/news/2015/12/30/oak-ridge-national-laboratory-achieves-milestone-with-plutonium-238-sample)