Concerning Dark Energy, We Do Know

question 144

Multiple Choice

Concerning dark energy, we do know

• A) that it is created when matter annihilates anti- matter.
• B) that it was revealed with Type II supernovae distances in the late 1990s.
• C) its density remains constant over time, so it is not important in the early universe.
• D) that it makes up 90% of all the matter and energy in the whole universe.
• E) combined with dark matter, it will ultimately produce a closed universe.

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