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Question 1:
Cosmology is the scientific inquiry into what the universe is like. By making assumptions that are not contradicted by the behaviour of the observable universe, scientists build models, or theories, that attempt to describe the universe as a whole, including its origin and its future. _____ . Then the model must be modified or discarded. Cosmologists usually assume that the universe, except for small irregularities, has an identical appearance to all observers. This uproven concept is called the cosmological principle.
A. In this way, they can examine the background of the events
B. These theories explain us how or when we came into being
C. They use each model until something is found that contradicts it
Feedback no explanation
D. They can speculate on our future by using several equipments during the observation

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