What Happens After the Universe Ends?
PBS Space Time・2 minutes read
The universe began with the big bang and will expand indefinitely towards emptiness, with questions remaining about events before and after. Conformal Cyclic Cosmology by Sir Roger Penrose suggests a cyclical universe with endless big bangs, supported by conformal transformations and the concept of invariance under scale changes.
Insights
- Conformal Cyclic Cosmology, proposed by Sir Roger Penrose, suggests an infinite cycle of universes through a process where the end of one universe leads to the birth of a new big bang, emphasizing the importance of conformal transformations that maintain angle consistency despite scaling space.
- Penrose's theory aims to elucidate the early universe's smoothness and low entropy without resorting to cosmic inflation, with testing involving the search for specific features in the cosmic microwave background radiation left by collisions of supermassive black holes from previous universes, although no concrete evidence of information transfer between universes has been found yet.
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Recent questions
What is the Big Bang theory?
The Big Bang theory posits the universe began in extreme heat and compression, expanding infinitely towards cold emptiness.
What is Conformal Cyclic Cosmology?
Conformal Cyclic Cosmology suggests the universe's end will lead to a new big bang, forming an endless chain of universes.
How do conformal transformations work?
Conformal transformations scale space while preserving angles, allowing for equivalence of large and small universes.
Why is conformal invariance important?
Conformal invariance under scale changes is crucial as angles remain constant despite alterations in size.
How does Penrose's theory explain the early universe?
Penrose's theory aims to explain the smoothness and low entropy of the early universe without relying on cosmic inflation.
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