ASTRON 10 Lecture Notes - Lecture 5: Planetary Nebula, Supernova, Triple-Alpha Process
Document Summary
Shells of different fusing elements exist within a red giant. Hydrogen fusing shell, helium fusing shell, carbon fusing shell, etc. If a red giant does not have enough mass to go supernova, the upper parts are simply removed, which creates a planetary nebula. With current technology, it is visible for 50,000 years. Some of the most beautiful objects in the sky. Is very hot, can give edges comet-like tails. Naming is because looking at a it from a certain angle makes it appear circular, like a planet. Viewing from other angles make it look similar to a figure 8. Two indentations and two bulbs of gas. Hubble"s best object to image is planetary nebulae. Release a flare lasting for a few minutes. Never have seen the spectrum of one of these flares because they are so short. Elements / their place of origin / and their method of dispersal.
