Multiple Choice
The standard bulbs (standard candles) that made it possible for astronomers to discover the acceleration in the expansion of the universe were
A) globular clusters
B) Cepheid variable stars
C) the brightest irregular galaxy in a rich cluster
D) Type Ia supernovae
E) the size of a galaxy dark matter halo
Correct Answer:
Verified
Correct Answer:
Verified
Q5: Which of the following statements about the
Q6: Today, we believe that only a small
Q7: Which of the following did NOT happen
Q8: The first satellite (spacecraft with instruments) to
Q9: How does a period of extremely fast
Q11: Why did Einstein introduce the cosmological constant
Q12: According to our textbook, roughly what percent
Q13: At about 1 second after the beginning
Q14: In our modern view of the expansion
Q15: Scientists looking at an overview of physics