What Observation Has Prompted Astronomers to Ponder the Possible Existence

question 1

Multiple Choice

What observation has prompted astronomers to ponder the possible existence of dark energy?

• A) Discovery of quasars
• B) Discovery of superclusters
• C) Supernovae appear fainter than expected at large redshifts.
• D) Uniform nature of the cosmic microwave background (CMB).

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Definitions:

Double-Blind Test

A scientific experiment where neither the participants nor the experimenters know who is receiving a particular treatment to eliminate bias.

Researchers And Patients

The relationship between individuals conducting medical or scientific studies and the individuals participating in these studies, often as subjects receiving treatment or as focus groups.

Phase III Clinical Trials

The third phase in clinical research that involves large-scale testing of a new drug or treatment on patients to assess its effectiveness and safety.

Drug Companies

Corporations engaged in the research, development, production, and marketing of drugs and medications.