The Southampton Theory Astrophysics and Gravity (STAG) Research Centre is pleased to invite you to the 2021 STAG Public Lecture:
THE PROBLEM IN SPACE-TIME SINGULARITIES: WHERE DOES THIS LEAD US IN COSMOLOGY?
By Physics Nobel Laureate Sir Roger Penrose
Wednesday 20th October 2021 14:30 (BST)
NOTE: PRIOR REGISTRATION WITH STAG IS REQUIRED FOR THIS ZOOM EVENT
The singularity theorems of the 1960s showed that not only are the space-time singularities of gravitational collapse generic expectations of classical general relativity, but so also is the big bang singularity a generic phenomenon (work largely by Stephen Hawking) for a rapidly expanding early universe. Whereas the mathematical arguments are time-symmetric in this way, our physical expectations (profoundly related to the 2nd Law of thermodynamics) are very different for the two types of singularity. The common view is that the resolution of the singularity problem must be through quantum gravity, but this cannot resolve this gross and fundamental time-asymmetry problem.
Conformal geometry provides a completely different outlook, which not only resolves this issue, but leads to observational implications that appear to be strongly confirmed in recent analyses of the cosmic microwave background radiation.
The STAG Research Centre brings together world- leading academics from three research groups – Particle Physics, Astrophysics and Gravitation – to explore issues of fundamental physics and astronomy.
Ticket and zoom registration details are on the STAG website:
Please contact STAG-Centre@soton.ac.uk for further information or with any questions.
To find out more about the STAG research centre visit www.southampton.ac.uk/stag