News

Five-dimensional black hole could ‘break’ general relativity

20 February 2016 Astronomy Now

Researchers from the University of Cambridge and Queen Mary University of London have shown how a bizarrely shaped black hole could cause Einstein’s general theory of relativity, a foundation of modern physics, to break down. However, such an object could only exist in a universe with five or more dimensions.

News

Celebrating the golden anniversary of black-hole singularities

2 October 2015 Astronomy Now

When a star collapses forming a black hole, a space-time singularity is created wherein the laws of physics no longer work. In 1965, Sir Roger Penrose presented a theorem where he associated that singularity with so-called ”trapped surfaces” that shrink over time. That hypothesis — one of the results of the general theory of relativity — is now celebrating its 50th anniversary.