The standard cosmological model, which is based on the Big Bang theory, estimates the age of the Universe by observing the expansion rate (using the Hubble constant) and the composition of the Universe (from Cosmic Microwave Background data, e.g., from Planck or WMAP satellites). Current estimates based on these observations place the age of the Universe at approximately 13.8 billion years.
According to the Big Bang theory of the origin of the Universe, the age of the Universe is estimated at about :
Asked in UPSC CISF AC EXE 2023 · Topic: Space (Cosmic Microwave Background Radiation (CMBR) and Expansion of the Universe)
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