CTB 1, also known as Abell 85 or the Garlic Nebula, is a supernova remnant about ten thousand light years away in Cassiopeia. What you are seeing is the expanding shell of gas left behind after a massive star exploded thousands of years ago. The blue structures trace oxygen rich filaments while the red reveals glowing hydrogen shaped by shock fronts racing through the surrounding interstellar medium. The asymmetric bubble and the long trailing filament suggest the original blast expanded into a lopsided environment where dense clouds slowed one side of the shock while the other burst freely into space.

Captured from Nerpio, Spain at the AstroCamp hosting facility, this field shows just how intricate a supernova remnant can be on large scales. The surrounding hydrogen landscape forms a deep red canvas where faint tendrils and rippling waves continue to drift outward. CTB 1 is relatively faint compared to iconic remnants, but its complex structure has made it a favorite for astrophotographers who want to reveal the fine turbulence left behind after a star’s final act.