Multiple Choice
The high redshifts seen for quasars could also be interpreted as nearby objects with high Doppler shifts caused by rapid motion.Why has this interpretation generally been rejected?
A) These velocities would exceed the speed of light.
B) The relativistic mass increase and length contraction for objects at these speeds would result in densities that would make these objects black holes-and they would then be invisible.
C) Such motions through the interstellar gas in a galaxy would create a huge outburst of X rays, and this is not seen.
D) Such motions would be large enough to make these objects no longer bound to their galaxies.
Correct Answer:
Verified
Correct Answer:
Verified
Q33: An astronomer studying a distant cluster of
Q110: What mechanism is believed to produce flocculent
Q280: Which type of galaxy contains primarily Population
Q281: Cygnus A,a strong radio source,is also designated
Q282: The MOST important reason globular clusters are
Q284: In a spiral galaxy,the:<br>A) spiral arm tightness
Q286: The present estimate for the total mass
Q287: Which parameter representing the motion of the
Q289: In the 1920s,Edwin Hubble began answering the
Q290: What is a rich cluster of galaxies?<br>A)