A poster with the most common objects you will find in a galaxy, most are of stellar mass. Evolution can be tracked from left to right. Start at the interstellar dust and gas (center left) and progress right-ward, as the nebula evolves into a young stellar object, becomes a star and evolves on the main sequence. General scenarios of stellar evolution are shown depending on the mass, with end products being brown and red dwarfs, neutron stars and black holes, supernova explosions, and white dwarfs.
For educational use only. 300 dpi version of this poster is available upon request. I have tried to retain copyrights and give credit to the original image authors wherever possible, however, due to time constraints could not have done so for all the objects. Please contact me if you believe I need to include a reference.