The nebula is currently 110 light years across, but it's going to keep getting bigger. The nebula is created by the fast-moving wave of gas sent out into space by the explosion of the former star. As that gas plows into cooler, more dense intersteller gas, it produces light.
The new image comes from six combined Hubble images, and it shows just two light years of the massive structure.
The gorgeous colors of nebulae come from ionized gases. In the Veil Nebula, we can see red -- from glowing hydrogen; green from sulfur; and blue from oxygen.