Could there be stars formed in the very early universe with colors unlike anything we see today?
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- What are the colors of supernovae of different types (Type Ia, Type II)? How do the colors of novae eruptions evolve over time?
- How has our understanding of star colors evolved over time? What were early beliefs about the colors of stars?
- How do the colors of stars in galaxies at different cosmological epochs compare?
- How does the age and metallicity of a galaxy affect the colors of its stars? What are hypergiants and what colors do they typically have?
- How do different stellar models predict the colors of stars under various conditions? What role does nuclear fusion play in determining a star's color?
- What are the colors of stars that have recently formed out of mergers of smaller systems?
- Are there any selection effects that might lead us to preferentially observe stars of certain colors?
- Are there any stars that are so dense that their gravity significantly affects the color of their emitted light? What are the colors of stars in the Andromeda galaxy compared to those in our own?
- How do cosmological simulations help us understand the distribution and evolution of star colors in the universe? What are the observational biases that might affect our understanding of the true distribution of star colors?
- Are there red galaxies or blue galaxies?
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