Interstellar Spacecraft (IMAGE) University of Iowa Caption Iowa physicists have confirmed the spacecraft Voyager 2 has entered interstellar space, in effect leaving the solar system. Data from Voyager 2 has helped further characterize the structure of the heliosphere, structure of the heliosphere -- the wind sock-shaped region created by the sun's wind as it extends to the boundary of the solar system. Credit NASA JPL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.