Multiple Choice
What discovery in 1998 changed our understanding of the overall history of the universe?
A) The universe is permeated with radiation at microwave frequencies.
B) The universe is expanding, and has been since the Big Bang.
C) The expansion of the universe is slowing, and will eventually reverse, ending in a Big Crunch.
D) The expansion of the universe is accelerating, due to an unknown cause known as dark energy.
E) Rotational measurements of our galaxy and others demonstrated the existence of dark matter.
Correct Answer:
Verified
Correct Answer:
Verified
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