Why is there a limit to the size of the observable universe?
A) because the universe has a finite radius
B) because galaxies appear to be moving away from us
C) because the sky is dark at night
D) because the universe has a finite age
Correct Answer:
Verified
Q4: What property of an antiproton is opposite
Q12: Approximately how long after the big bang
Q13: When people hear the phrase "big bang,"
Q14: Galaxy A is twice as far away
Q15: Which of the following statements best describes
Q16: What is the Hubble time?
A) the time
Q18: During the first moments of the big
Q19: If we lived in a static, unchanging
Q20: A universe is finite in time if
Q22: Which of the following is a characteristic
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