Physics

The dark side of the universe

Print edition : April 28, 2017

Figure 3: Inhomogeneities in the universe seen on the large scale.

Saul Perlmutter. Photo: AFP

Adam Riess. Photo: AFP

Brian Schmidt. Photo: AFP

Professor Subir Sarkar of Oxford University.

Figure 1: Pie chart depicting the contents of the universe.

Figure 2: Supernovae characteristics: Tree diagram showing different classes of supernovae.

It is widely accepted that the dominant fraction of the total mass-energy content in the universe consists of “dark energy”, which is pushing galaxies away from each other at a rate that is increasing with time. But a recent analysis has found that the very evidence for accelerated expansion of the universe is weak.
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