Is There an Unknown Source of Energy Contributing to Our Universe's Expansion?

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SUMMARY

The discussion centers on the misconception that an unknown energy source contributes to the universe's expansion. Participants assert that the expansion, including accelerated expansion, is a natural phenomenon explained by the cosmological constant in Einstein's equations. The conservation of energy theorem is emphasized, confirming that energy cannot be created or destroyed, only transformed. Therefore, no external energy input is necessary to account for the universe's expansion.

PREREQUISITES
  • Understanding of Einstein's cosmological constant
  • Familiarity with the conservation of energy theorem
  • Basic knowledge of spacetime concepts
  • Awareness of fundamental physics principles regarding matter
NEXT STEPS
  • Research Einstein's cosmological constant and its implications for cosmology
  • Study the conservation of energy theorem in the context of physics
  • Explore the concept of spacetime and its properties
  • Investigate the implications of matter conservation in the universe
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Physicists, cosmologists, and anyone interested in understanding the fundamental principles governing the universe's expansion and energy conservation.

brucephy
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my friend tell me that there is a energy input from unknown system to our system. it can prove by constantly expand of my universe. is he correct?
 
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brucephy said:
my friend tell me that there is a energy input from unknown system to our system. it can prove by constantly expand of my universe. is he correct?

No. With a cosmological constant in Einstein's equation, expansion, and even accelerated expansion such as we see, is natural, an inner property of our spacetime. There is no reason to invoke an outside agency.
 
Its the basic conservation of energy theorum: energy can not be distroyed nor created, but it can be converted. :smile:

SelfAdjoint is also correct. There is another theorum another theorum that basically says matter can not be created or distroyed. So what we've got is all the matter we have.
 

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