Double-lobed radio galaxies are an effect of black hole jets.
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Q4: The luminosity of a Seyfert galaxy varies
Q11: Black holes erupt when matter flows into
Q12: Quasars are isolated supermassive black holes, and
Q13: Matter flowing into a black hole cools
Q14: Seyfert galaxies are_
A) spiral galaxies with unusually
Q17: Most supermassive black holes are dormant.
Q18: Collisions in the early Universe were rare.
Q19: The broad emission lines of Seyfert galaxies
Q20: Quasars are caused by galaxy collisions in
Q21: Quasars have a(n) _.
A) extremely high blueshift
B)
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