* Astronomy

Members Login
Post Info TOPIC: Big Bang


L

Posts: 131433
Date:
RE: Big Bang
Permalink  
 


Stephen Sackur talks to Sir Roger Penrose about his latest theory on what may have existed before the Big Bang.
Read more

Title: On Penrose's `before the big bang' ideas
Authors: C. Denson Hill, Pawel Nurowski

We point out that algebraically special Einstein fields with twisting rays exhibit the basic properties of conformal Universes considered recently by Roger Penrose.

Read more (11kb, PDF)



__________________


L

Posts: 131433
Date:
Permalink  
 

"A team of physicists has claimed that our view of the early Universe may contain the signature of a time before the Big Bang.
The discovery comes from studying the cosmic microwave background (CMB), light emitted when the Universe was just 400,000 years old."

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

Once upon a time, time was different. Supernova explosions in the early universe appear to age more slowly than today's supernovae, as if time itself was running slower back then, according to a recent series of astronomical observations. This cosmic time warp is exactly what should be produced by the expansion of the universe, confirming conventional big bang theory.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 







__________________


L

Posts: 131433
Date:
Permalink  
 





__________________


L

Posts: 131433
Date:
Permalink  
 





__________________


L

Posts: 131433
Date:
Permalink  
 





__________________


L

Posts: 131433
Date:
Permalink  
 





__________________


L

Posts: 131433
Date:
Permalink  
 



__________________


L

Posts: 131433
Date:
The False Vacuum
Permalink  
 


The False Vacuum arises naturally in any theory that contains scalar fields, that is, fields that resemble electric or magnetic fields except that they have no direction. The Higgs fields of the Standard Model of particle physics or the more speculative grand unified theories are examples of scalar fields. It is typical of Higgs fields that the energy density is minimal not when the field vanishes, but instead at some nonzero value of the field.

 Read more



__________________
«First  <  1 2 3 4 5 6 7 8  >  Last»  | Page of 8  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard