The veil nebula is a supernova remnant of a star that died a mere 8,000 years ago and was more than 20 times the mass of our Sun. When stars like this go supernova, they give off a massive shockwave pulse that pushes material out at astronomical speeds. Each color in this photo represents a different type of element or material. You can spot the fluffy green clouds at the bottom of this colorful speedway, which have yet to interact with the supernova’s shockwave. But the red regions are gases that are just beginning to interact with the pulse, and are traveling at an astounding 1.5 million kilometers per hour.
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