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Merging Neutron Stars Deliver Deathblow To Dark Matter And Dark Energy Alternatives

1 Nov 2017, 14:01 UTC
Merging Neutron Stars Deliver Deathblow To Dark Matter And Dark Energy Alternatives
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In the final moments of merging, two neutron stars don’t merely emit gravitational waves, but a catastrophic explosion that echoes across the electromagnetic spectrum. The arrival time difference between light and gravitational waves enables us to learn a lot about the Universe. Image credit: University of Warwick / Mark Garlick.Don’t believe in dark matter or dark energy? Your view of the Universe just got a lot more difficult.If you ask an astrophysicist what’s the greatest puzzle in the Universe today, two of the most common answers you’ll get are dark matter and dark energy. The stuff that makes up everything we know of here on Earth, atoms, which is in turn made up of other fundamental particles, adds up to only around 5% of the cosmic energy budget. Either 95% of the energy in the Universe is in these two forms, dark matter and dark energy, that have never been directly detected, or something is wrong with our current picture of the Universe. These alternatives have been explored at length, with many options leading to slightly different physical consequences. With the first observation of merging neutron stars, and signals in both gravitational waves and light from across the electromagnetic spectrum ...

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