The Garlic Nebula, cataloged as CTB 1, is a supernova remnant located in the constellation Cassiopeia. It marks the expanding shock front from a massive star that ended its life thousands of years ago, sweeping up and ionizing the surrounding interstellar medium. The faint, nearly spherical shell traces regions of energized hydrogen, oxygen, and sulfur, revealing how stellar explosions enrich and restructure their galactic environment.

Captured with 84 hours of total exposure from Starfront Observatories in Rockwood, Texas, USA, this deep narrowband image brings out the delicate filaments and turbulent arcs that give CTB 1 its distinctive, clove-like appearance. The contrasting cool blue oxygen emission against warmer hydrogen and sulfur highlights the layered structure of the remnant, while the surrounding star field provides scale to the vast, slowly fading echo of a stellar death.