NASA Science News for Dec. 16, 2014
Since 2012, NASA's Voyager 1 spacecraft has experienced three 'tsunami waves' in interstellar space. The most recent, which reached the spacecraft earlier this year, is still propagating outward according to new data.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2014/16dec_voyagercme/ (http://science.nasa.gov/science-news/science-at-nasa/2014/16dec_voyagercme/)