Loop I Bubble
The Loop I Bubble is a cavity in the interstellar medium (ISM) of the Orion Arm of the Milky Way. From our Sun's point of view, it is situated towards the Galactic Center of the Milky Way galaxy. Two conspicuous tunnels connect the Local Bubble with the Loop I cavity (the Lupus Tunnel).
- Lallement, R.; Welsh, B. Y.; Vergely, J. L.; Crifo, F.; Sfeir, D. (2003). "3D mapping of the dense interstellar gas around the Local Bubble". Astronomy and Astrophysics 411 (3): 447. Bibcode:2003A&A...411..447L. doi:10.1051/0004-6361:20031214.