Where is the universe expanding?

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SUMMARY

The universe is expanding uniformly in all directions, and it does not expand into any external space. There is no "outside" to the universe; it comprises all of space itself. The concept of expansion should be understood as a change in internal distances rather than movement into a larger area. This understanding challenges traditional views of spatial expansion.

PREREQUISITES
  • Understanding of cosmology concepts
  • Familiarity with the Big Bang theory
  • Knowledge of spatial geometry
  • Basic principles of general relativity
NEXT STEPS
  • Research the implications of the Big Bang on cosmic expansion
  • Study the principles of general relativity and their relation to space
  • Explore the concept of cosmic inflation and its effects on the universe
  • Investigate observational evidence for the expansion of the universe
USEFUL FOR

Astronomers, physicists, cosmologists, and anyone interested in understanding the nature of the universe and its expansion.

nil1996
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we all know the that the universe is exapnding. But where it is expanding?
 
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nil1996 said:
we all know the that the universe is exapnding. But where it is expanding?

It is expanding everywhere. If you mean what is it expanding INTO, then there is no such thing. It is not expanding INTO anything.
 
nil1996 said:
we all know the that the universe is exapnding. But where it is expanding?

Why should the universe be located in any larger space?. It does not need to be anywhere. Internal distances can simply expand without there being any exterior.

Think of the universe as comprising all space. It is impossible to view it from the "outside" because there is no outside. So you must understand expansion differently from the way one does when one can view something from outside in the context of a surrounding space.

Changes in the geometry of space are experienced and measured by creatures living within that space.
 

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