Black holes can be characterized by their event horizons.

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a) If the sun were compressed sufficiently enough so that it would turn into a
black hole, what would be the event horizon of such an object expressed in
km?
b) What is the event horizon for a black hole with a mass of 10
9
Msol?
c) What is the event horizon for the black hole with a mass of 4•10
6
Msol
in the
center of our Galaxy
 
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