Cosmology- Extinct & Mysterious

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(Image ref: https://astronomy.swin.edu.au/cosmos/c/cosmology)


The stars were fixed on a celestial sphere that circled around the spherical Earth, according to Greek thinkers in the 4th century BC. Between the Earth and the stars, the planets, the Sun, and the Moon all traveled in a fluid called ether. The term cosmology comes from the Greek word kosmos, which means order or harmony. Cosmologists are fascinated by the universe's origins, evolution, and future.


While other branches of astronomy focus on single objects, events, or sets of things, cosmology encompasses the entire cosmos from conception to death, with a variety of mysteries at each stage.

The Big Bang was the beginning of space and time. While there are a number of theories about the existence of other universes, there is no practical way to observe them, so there will never be any proof for (or against!) their existence.


  • What is the age of the Universe? The cosmos is 13.8 billion years old, give or take a hundred million years, according to findings given by the Planck team in 2013.

  • Is the Universe Doomed? The density of the cosmos determines whether or not it will end. If the real density of the cosmos is larger than their estimates, the universe's expansion will stall and then reverse, finally collapsing. The universe, on the other hand, will continue to expand indefinitely if the density is less than the critical density.

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