You have to realize that everything in outer space is probably 800 Hundred Trillion Light years across, that's the size of the dirt storms in the nebulas. Plus, it's flammable gases like the insides planets atmospheres so why is it burning? Well the storms are filled with oxygen, carbon dioxide, flammable liquids etc. so when something that size ignites then it will burn in a bubble contained like inside a planet for 800 Trillion infinite light years as it burns off.
Plus I think they are taking pictures of "unstable regions" that are exploding and recirculating and perhaps creating the blue prints for new planets. So most of the "dramatic" images on Hubble are probably from these "unstable" regions. Like the massive amounts of dirt would be the "fundamental elements" that will later circulate to form new planets - that dirt will eventually be the ground and core of planets in the future and the gases around them will be the atmosphere. You can probably even see planets forming in the pictures, if they can get that close, as the region stabilizes like ours, cools off and begins to form planets.
Here are several pictures I got from www.spacetelescope.org .