Current ideas suggest that what is responsible for the observed properties of a quasar is a massive

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Current ideas suggest that what is responsible for the observed properties of a quasar is a massive
a. Neutron star
b. Black hole 

c. Spiral galaxy

d. Star cluster

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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