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QUESTION
Explain how a cool, red star like Betelgeuse can have a much higher luminosity than a hotter star like the Sun.1. How is cosmological redshift
- Explain how a cool, red star like Betelgeuse can have a much higher luminosity than a hotter star like the Sun.1.
- How is cosmological redshift different from the Doppler shift?
- Explain the evidence that suggests other galaxies and galaxy cluster contain dark matter
- Briefly describe the four possible fates of the universe.
