In the late 1990's, it was discovered from distances of ______in distant galaxies that the expansion of the universe is ___________
A) Cepheid variables; accelerating
B) Cepheid variables; decelerating
C) supernovae; accelerating
D) supernovae; decelerating
Correct Answer:
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Q2: As the universe cooled, it eventually reached
Q3: Dark energy is the name of the
A)
Q4: If the universe is closed, then its
Q5: The flatness problem and horizon problem
A) are
Q7: In the late 1990's, it was announced
Q8: Current observations indicate that the amount of
Q9: What was the temperature of the universe
Q10: Measured ages of globular clusters suggests that
Q17: During the first moments of the big
Q18: When a proton and an antiproton collide
A)they
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