|Image credit: A minute portion of the 110 light-year nebula. NASA/ESA/Hubble Heritage Team|
The light we can see in the photo above is being produced by a fast-moving blast wave from the star’s detonation as it meets a wall of cool, thicker interstellar gas that was propelled into space by the star before it blasted. The colors relate to the former star’s gases: the red glow is the result of hydrogen, blue is from oxygen and green from sulfur. To give some perception, NASA has made a video that zooms in from the night sky to the constellation Cygnus, where this stunning nebula lies. So you should take a look below.