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Grid computing to tackle the mystery of the dark universe

26 November 2016 Astronomy Now

Scientists from the University of Manchester working on the revolutionary Large Synoptic Survey Telescope project have harnessed the power of distributed computing from the UK’s GridPP collaboration to tackle one of the universe’s biggest mysteries — the nature of dark matter and dark energy.

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New theory of gravity might explain dark matter

8 November 2016 Astronomy Now

Emergent gravity is a new theory that might explain the curious motions of stars in galaxies. It predicts the exact same deviation of motions that is usually explained by invoking dark matter. Professor Erik Verlinde, renowned expert in string theory, publishes a new research paper today in which he expands his groundbreaking views on the nature of gravity.

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The universe is expanding at an accelerating rate — or is it?

21 October 2016 Astronomy Now

Five years ago, the Nobel Prize in Physics was awarded to three astronomers for their discovery, in the late 1990s, that the universe is expanding at an accelerating pace. Now, a team of scientists led by Professor Subir Sarkar of Oxford University’s Department of Physics has cast doubt on this standard cosmological concept.

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Astronomers use cosmic voids to study the universe

12 August 2016 Astronomy Now

Researchers who are looking for new ways to probe the nature of gravity and dark energy in the universe have adopted a new strategy: looking at what’s not there. An international team of astronomers were able to achieve four times better precision in measurements of how the universe’s visible matter is clustered together by studying the empty spaces in between.

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Hubble finds universe is expanding faster than expected

2 June 2016 Astronomy Now

When Edwin Hubble discovered nearly 100 years ago that the universe was uniformly expanding in all directions, the finding was a big surprise. Then, in the mid-1990s, another shocker occurred: astronomers found that the expansion rate was accelerating, perhaps due to “dark energy.” Now, the latest measurements of our runaway universe suggest that it is expanding faster than astronomers thought.

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Deepest 3-D galaxy map suggests Einstein’s theory stands true

11 May 2016 Astronomy Now

Using data from the 8.2-metre Subaru Telescope, an international team led by Japanese researchers has made a 3-D map of 3,000 galaxies 13 billion light-years from Earth. Based on this comprehensive survey — the first such study at this great distance — the team was able to confirm that Einstein’s general theory of relativity is still valid.

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Supermassive black holes banish matter into cosmic voids

26 February 2016 Astronomy Now

On the largest scales, galaxies and everything they contain are concentrated into filaments that stretch around the edge of enormous voids. Data from the Illustris project, a large computer simulation of the evolution and formation of galaxies, suggests that the black holes at the centre of every galaxy are helping to send matter into the loneliest places in the universe.