What Is Cosmology and How Does It Relate to the Speed of Light?

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    Cosmology Means
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Discussion Overview

The discussion centers on the concept of cosmology, its definition, and its relationship to the speed of light, including the implications of the Big Bang theory and the expansion of the universe.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants define cosmology as the study of the universe as a single system.
  • One participant suggests that the Big Bang theory is a foundational aspect of cosmology, explaining that observations of stars moving away from Earth contribute to this understanding.
  • There is a mention of the relationship between the speed of expansion of distant stars and the implications for the Big Bang theory, with a request for clarification on how this relates to the speed of light and relativity.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and curiosity about cosmology, with some definitions and concepts being clarified while others remain open for further exploration and discussion.

Contextual Notes

The discussion includes assumptions about the nature of cosmology and the implications of the Big Bang theory, but these assumptions are not universally agreed upon or fully explored.

somy
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Hi.
I just wanted you to tell me does exactly cosmology means?
and about the works done in it.
thanks in advanced.
somy :smile:
 
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Cosmology is the study of the entire universe as a single system.
 
Dear LURCH:
can you explain more about it ?
I mean the results of this assumpsion.
Thanks in advanced :smile:
 
explain more about cosmology?
what do you wish to know?
 
The Big Bang theory is probably the best place to start. You see, in astronomy an observatory may detect that a star is moving away from us (the Earth). The same telescope (or another) might lok in the opposite direction and see that a star over there is miving away from us as well. These are astronomical observations; such and such a star moving at such and such a speed.

When many of these observations are put together to form a single coherent picture of the universe, i.e., "all of the stars are moving away from us, and the more distant ones are moving more rapidly", that is cosmology. From this observation, it was concluded that in the past, all the stars were closer together. The further back in the past we look, the the closer together the stars would be. Therefore, if we look far enough back, all the stars were together in one place. This is the big bang theory, and it is a cosmological model.
 
Thanks LURCH.
Another question:
You talked about the speed of expansion and that, the farther stars expand with a higher speed. can you tell me about the relativity and the limit of light's speed?
Thanks a lot.
 

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