What determines the colors of planetary nebulae?
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- How is the U-B color index used?
- What about orange stars?
- What are some good introductory books or resources for learning more about star colors? How has the understanding of star colors impacted other fields of astronomy and astrophysics?
- What are dark nebulae and how do they obscure the light of colored stars behind them?
- Could there be stars with colors that we haven't yet observed or predicted?
- How do the colors of stars in the Virgo Cluster of galaxies compare to those in the Local Group?
- What about a supergiant star? Do planetary nebulae have distinct colors?
- What are FU Orionis stars and what causes their dramatic changes in brightness and potentially color? What are post-AGB stars and what colors might they display as they evolve towards planetary nebulae?
- How do symbiotic stars behave and what color variations might they exhibit due to mass transfer?
- What are G-type stars and what color is our Sun? What are K-type stars and their typical hue?
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