Blog Update — Veil Nebula (4-Panel Mosaic Progress)
Over the last few weeks I’ve returned to the Veil Nebula with a proper long-term plan: build out a full 4-panel mosaic with enough integration time to finally pull out the faintest strands of oxygen and sulphur drifting across this ancient supernova remnant.
This new version is my first full process pass using the updated data — now sitting at around 16 hours total exposure spread evenly across the mosaic. Even at this stage, the difference is huge. The extra depth has brought out delicate filaments that were barely visible before, along with more structure in the darker, ghost-like wisps threading through the centre.
What’s been especially rewarding is seeing how the Forax SHO blend responds as the hours stack up. The contrast between the cool OIII arcs and the warm, ember-like SII regions is starting to take on that three-dimensional look the Veil Nebula is famous for.
There’s still more work ahead — more time to collect, more fine-tuning across the panel seams, more experimenting with colour balance and star control — but this feels like a proper milestone. The mosaic is finally beginning to feel complete.
Forax Palette
The Veil Nebula in the Forax colour palette reveals a haunting, almost ethereal web of gas and dust. This palette enhances subtle contrasts, drawing out the intricate wisps that sweep across space like cosmic brushstrokes. What we’re seeing are the remnants of a massive star that exploded roughly 8,000 years ago, its energy still rippling through the interstellar medium. At about 110 light-years wide and located 2,400 light-years away in the constellation Cygnus, the Veil is expanding at a staggering 1.5 million kilometres per hour. The Forax mapping really brings out the fine filaments, giving us a sense of just how delicate, yet vast, this supernova remnant truly is.
Hubble Palette (SHO)
In the Hubble palette, the Veil Nebula takes on an entirely different personality—bold, vivid, and structured. By assigning sulphur to red, hydrogen to green, and oxygen to blue, the SHO mapping creates a detailed chemical portrait of the nebula. This technique highlights the powerful shockwaves as they carve through the interstellar medium, showing glowing arcs where different elements collide and interact. The Veil isn’t just a pretty sight—it’s a living laboratory of astrophysics, helping astronomers study the long-term effects of stellar death. From its vibrant colours to its turbulent motion, the Hubble palette showcases the raw energy still locked inside this vast, expanding ghost of a star.