Perseus-Taurus Shell

The Perseus-Taurus Shell (also shortened to the Per-Tau shell) is a near-spherical cavity in the interstellar medium, 500 light-years wide, located in the Perseus-Taurus constellations.^{[1] [2]} A team from the Harvard Smithsonian Center for Astrophysics led by Catherine Zucker and Shmuel Bialy discovered the structure in 2021.^[2] Scientists believe that it appeared following the explosions of ancient supernovae.^[3][4][5] Molecular clouds surround the sphere-shape cavity.^[6]

Side-on 3D view of the Per-Tau Shell, giant structure forming star-forming molecular clouds