Supernova Bubble's Mesmerizing Expansion Captured in Hubble Time-lapse

NASA's Hubble Space Telescope has captured a time-lapse movie of the expanding supernova bubble known as the Cygnus Loop. The Hubble images taken from 2001 to 2020 show how the shock front of the supernova remnant has expanded over time, revealing that it is moving into interstellar space at over half a million miles per hour. The images also provide insights into the density differences and turbulence encountered by the shock wave as it propagates through space. The close-up view of the filaments of glowing hydrogen shows ripples and twisted ribbons of light, which arise from the shock wave encountering different densities of material in the interstellar medium.