What is the MOST outstanding feature of a quasar compared with other objects in deep space?
A) small size
B) great distance from Earth
C) short lifetime
D) prodigious output of energy
Correct Answer:
Verified
Q1: Astronomers initially had difficulty identifying the emission
Q2: The energy output per second of a
Q3: The energy output per second of a
Q4: Cygnus A, a strong radio source, is
Q6: Astronomy with a radio telescope was initiated
Q7: Quasars typically appear to be
A) extremely massive
Q8: One of the first three astronomical objects
Q9: The emission lines in quasar spectra were
Q10: Redshifts revealed the radio source Cygnus A
Q11: Most quasi-stellar objects (QSOs) produce their strongest
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