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Use the Hubble law, the apparent visual magnitude of +12.9 and the observed redshift z = 0.158 to estimate the absolute magnitude of the quasar 3C 273 (which is the brightest quasar known). Compare the luminosity of 3C 273 with that of the Andromeda Galaxy (M31), the Sun, and the giant elliptical galaxy M87. Are your results consistent with the statement in this chapter that a luminous quasar has typically 1000 times greater luminosity than a large normal galaxy?

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