Written by: Brian Swan September 16, 2013 NASA has confirmed in a press conference last week that the Voyager 1 spacecraft is believed to have entered the Interstellar Medium. Dr. Gary Zank, Director of CSPAR, was one of four scientific experts present at the NASA presentation to comment on this event. A video of the press conference, which was shown on NASA-TV, can be found . The media has covered the event in numerous articles, including the following links.