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.