NEBULA THE RETINA - On June 13, 2002, the Hubble telescope revealed a rainbow of colors in this dying star, If we were in a spacecraft, we would see the gas dust as vast donuts of material scattering outward from the dying star.  Located 1900 light years from our Earth. The nebula is defined in astronomy as a celestial object composed of rarefied gas, plasma or interstellar dust. Planetary nebulae which have nothing to do with the planets: They bear this name for historical reasons corresponding to the final stage of the life of the planets. low-mass stars. The star collapses on itself, injecting a shell of gas into space. Astronomers now also know the distance at which these planetary nebulae are located. https://platform.wise.art/author/robert-2/ http://astroliva.ch/