Voyager 1 is now the first space probe to reach interstellar space. It's still sending data back to earth which is amazing.
http://www.cbsnews.com/8301-205_162-57602736/voyager-1-finally-crosses-into-interstellar-space/
http://www.cbsnews.com/8301-205_162-57602736/voyager-1-finally-crosses-into-interstellar-space/