Observational cosmology is the study of the structure, the evolution and the origin of the universe through observation, using instruments such as telescopes and cosmic ray detectors. == Early observations == The science of physical cosmology as it is practiced today had its subject material defined in the years following the Shapley–Curtis debate when it was determined that the universe had a larger scale than the Milky Way.
Observational cosmology is the study of the structure, the evolution and the origin of the universe through observation, using instruments such as telescopes and cosmic ray detectors. == Early observations == The science of physical cosmology as it is practiced today had its subject material defined in the years following the Shapley–Curtis debate when it was determined that the universe had a larger scale than the Milky Way.
Source: Wikipedia "Observational cosmology" · CC BY-SA 4.0
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