Question: The bright core of a certain Seyfert galaxy had a luminosity of 10 10 L . The luminosity increased by 100 percent in a

The bright core of a certain Seyfert galaxy had a luminosity of 1010 LΘ. The luminosity increased by 100 percent in a period of 18 months. Show that this means that the energy source of the core is less than 9.45 x 104 AU in diameter. How does this compare to the diameter of the Milky Way?

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