Rosette Nebula (NASA, Spitzer, 4/18/07). This infrared image shows the Rosette nebula, a star-forming region more than 5000 ly away in the constellation Monoceros. Lurking inside this nebula are so-called 'danger zones'. These zones surround super hot stats, called O-stars (blue stars inside spheres), which give off intense winds & radiation. Young cooler stars that just happen to reside within one of these zones are in danger of having their dusty planet-forming materials stripped away.
Taken by Prosper Henry, 1885. This photograph of the Ring Nebula in the constellation Lyra shows but a three-degree section of the firmament, 1,956 light-years from earth. Once a star similar to our own sun, the nebula was formed when the star exploded, releasing gasses from its outer shell into space.
Vintage 1875 Antique Astronomy NEBULAE AND CLUSTERS, original bookplate, antique print