Rapidly rotating neutron stars ________.
A) produce radio waves at their magnetic poles, causing them to be perceived (from Earth's perspective) as pulsars
B) are more dense than black holes
C) have a central barred region
D) cannot be detected directly, but we can observe their gravitational effects on other physical objects
Correct Answer:
Verified
Q18: Cosmology is the study of _.
A)our solar
Q19: A light-year is _.
A)a long time
B)the distance
Q20: The Hertzsprung-Russell diagram shows _.
A)the age of
Q21: Some of the largest and the smallest
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