How Do We Know the Shape of the Universe

question 3

Multiple Choice

How do we know the shape of the universe?

• A) By observing distant stars during eclipses of the sun.
• B) By triangulation measurements involving the distances to the sun and to the moon.
• C) From the comparison between the pulsations coming from distant neutron stars.
• D) By observation of the angular size of a typical wavelike disturbance in the cosmic microwave background.
• E) By observing the light from distant stars and one star passes in front of another star.

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