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Question
All stars have roughly the same luminosity after the helium flash.Answer
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Related questions
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Why is the energy source for active nuclei like Seyferts thought to be compact?
A) The sources appear to be single stars in photos.
B) Their energy appears to be non-stellar synchrotron radiation.
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In active galaxies, their central engines may be temporarily fed by
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Describe the cycle of life and death we observe in the spiral arms.
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What advantage do radio astronomers have over optical ones in mapping the entire Milky Way?
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Virtually the entire disk of the Galaxy has been mapped using the ________ wavelength.