Cosmology, study of the universe as a whole, including its distant past and its future. Cosmologists study the universe observationally—by looking at the universe—and theoretically—by using physical laws and theories to predict how the universe should behave. Cosmology is a branch of astronomy, but the observational and theoretical techniques used by cosmologists involve a wide range of other sciences, such as physics and chemistry. Cosmology is distinguished from cosmogony, which used to mean the study of the origin of the universe but now usually refers only to the study of the origin of the solar system.
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Showing posts with label Cosmology. Show all posts
Showing posts with label Cosmology. Show all posts
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Atomic clock, electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must co...
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. Vacuum Tubes, electronic devices, consisting of a glass or steel vacuum envelope and two or more electrodes between which electrons can mo...
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. Evolution, in biology, complex process by which the characteristics of living organisms change over many generations as traits are passed ...