On the Basis of Recent Results from Very Bright and Very

question 3

Multiple Choice

On the basis of recent results from very bright and very distant Type Ia supernovae, which of these statements BEST characterizes the past and present motion of clusters of galaxies?

• A) The universe is "flat," with a decelerating rate of expansion.
• B) The universe is "open," with a constant rate of expansion given by the Hubble law.
• C) The universe is "closed," with a decelerating rate of expansion.
• D) The universe is "flat," with an accelerating rate of expansion.

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