View Full Version : A Newly Discovered Planetary Nebula Teaches Us About Galactic Composition

2011-May-06, 09:40 PM
Determining the chemical distribution of the galaxy is a tricky business. The ideal method is spectroscopy but since high quality spectroscopy takes bright targets, the number of potential targets is somewhat reduced. Stars seem like logical choices, but due to differential separation during formation, they don’t provide a true description of the interstellar medium. Clouds [...]

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