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.
NGC 474 is an elliptical galaxy in the constellation Pisces. This large galaxy is known to possess tidal tails, although their origins remain unknown. These tidal tails may be related to debris left over from absorbing numerous small galaxies in the past.