Two Lobes (image) Boston University Share Print E-Mail Caption The yellow shape in this figure is the heliopause, the boundary between the heliosphere and the local interstellar medium. The sun sits at the center of this large bubble, but is too small to be seen here. The gray lines are the solar magnetic field lines and the red lines are the interstellar magnetic field. Credit M. Opher Usage Restrictions None Share Print E-Mail 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.