NGC 6960 – The Veil Nebula

23.3 hours of narrowband and broadband integration, unveiling the delicate filamentary structure of an ancient supernova remnant.

Distance From Earth — ~2,100 Light Years
Dimater — 100 light years
Total Exposure Time — 23.3 Hours (12.2 in Dual Narrowband Ha/SIII, 1.3 in OSC for Star Color)

The Veil Nebula is the expanding shockwave of a massive star that exploded roughly 10,000–20,000 years ago. What remains are these impossibly thin, luminous filaments — hydrogen glowing red in H-alpha, ionized oxygen tracing cyan in [OIII] — still moving outward through the interstellar medium at hundreds of kilometers per second. NGC 6960 is the western arc of the complex, sometimes called the Witch's Broom, and contains the bright foreground star 52 Cygni near its northern tip.

The dual narrowband approach here was essential — separating the Ha and SIII channels brought out the fine structure in the filaments in a way broadband alone never could. 23+ hours of data to render something that's been quietly expanding across the sky.