Posts Tagged ‘dark energy’

In 1998, two teams of astronomers discovered the expansion of the Universe was accelerating, rather than slowing down, as the theory at the time suggested. Physicists speculated that the acceleration was caused by something they named dark energy.

Since then, observations have indicated that dark energy and dark matter together account for 96% of the Universe. The challenge has been to find ways of studying these invisible phenomena in detail.

The Dark Energy Survey DES is the most ambitious effort to date. It began in 2004 and involves 400 scientists from 26 institutions in seven countries.

The survey involves taking pictures of 26 million galaxies across a large expanse of the sky using the Blanco telescope in Chile. To do this, the research team had to build one of the most sensitive cameras ever built. The 570-megapixel camera is capable of detecting light from galaxies that are eight billion light-years away.

By studying the way in which the light was distorted by the intervening dark matter, researchers were able to calculate its distribution. And by studying the way in which the distribution changes over time they can calculate the way in which dark energy acts on it.

The team was also able to infer the amounts of dark energy and dark matter from the density and locations of galaxies.

The results show support for previous studies that indicate the Universe is made up of 4% ordinary matter, 26% dark matter and 70% dark energy.

The hope is that a detailed study of the map will give clues about what dark matter and dark energy might be and so lead to a more complete theory of physics.

The data released today draws from just one year of observations. The researchers plan to collect data for four more years over an even larger area of the sky. Professor Ofer Lahav of University College London (UCL), and chair of the DES Advisory Board, says “Once we have the full survey, 300 million galaxies and a thousand supernovae, we may be providing input for a new Einstein to tell us what does it all mean – why is the Universe made the way it is?”(BBC news/Pallab Ghosh-Aug.3,2017)

Now you know science doesn’t have all the answers. Yet there are know nothings to deny God merely because science hasn’t found proof for Him.

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