Multiple Choice
During which period in the universe's history did its galaxies undergo the MOST vigorous period of star formation?
A) the first 500 million years after the Big Bang
B) from about 500 million to 2.5 million years after the Big Bang
C) the past four billion years
D) the past billion years
Correct Answer:
Verified
Correct Answer:
Verified
Q139: What do astronomers mean when they say
Q140: If the geometry of space is hyperbolic,
Q141: What caused the Big Bang and the
Q142: The very small detected irregularities in the
Q143: The expansion of the universe takes place<br>A)
Q145: What is the isotropy (or horizon) problem?<br>A)
Q146: If the universe had expanded at its
Q147: The cosmic microwave background is found to
Q148: At about what time after the Big
Q149: Why does the observable universe have an