Interstellar Tunnels: Hidden Pathways in Our Galactic Home, Part 2 of 2

The cavities of our galaxy are blasted out by gigantic supernova explosions, with new stars forming along the edges of the holes  created by dying stars. It appears that some of these super-bubbles may have tunnels connecting them to other bubbles  or other structures, suggesting our Local Hot Bubble could be part of an intricate network of similar features throughout our galaxy.