Archive for the ‘cosmology’ category: Page 151

Oct 7, 2018

On the Nature of Causality in Complex Systems, George F.R. Ellis

Posted by in categories: biological, cosmology, mathematics

When listening to world science festival’s latest episode on youtube, Pondering the Imponderables: The Biggest Questions of Cosmology, I found myself to be most in line with George F.R. Ellis’ line of thinking overall.

Big Bang cosmology, chemical and biological evolutionary theory, and associated sciences have been extraordinarily successful in revealing and enabling us to understand the development of the.

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Oct 5, 2018

A new era in the quest for dark matter

Posted by in categories: cosmology, particle physics

Since the 1970s, astronomers and physicists have been gathering evidence for the presence in the universe of dark matter: a mysterious substance that manifests itself through its gravitational pull. However, despite much effort, none of the new particles proposed to explain dark matter have been discovered. In a review that was published in Nature this week, physicists Gianfranco Bertone (UvA) and Tim Tait (UvA and UC Irvine) argue that the time has come to broaden and diversify the experimental effort, and to incorporate astronomical surveys and gravitational wave observations in the quest for the nature of dark matter.

Over the past three decades, the search for dark matter has focused mostly on a class of particle candidates known as weakly interacting massive particles (or WIMPs). WIMPs appeared for a long time as a perfect dark matter candidate as they would be produced in the right amount in the early universe to explain dark matter, while at the same time they might alleviate some of the most fundamental problems in the physics of elementary particles, such as the large discrepancy between the energy scale of weak interactions and that of .

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Oct 4, 2018

We’ve Just Found The Source of Some of The Most Powerful Light Beams Ever Detected

Posted by in category: cosmology

Matter ejected from a spinning disc of doom surrounding a black hole a mere 15,000 light years away has produced some of the most energetic rays of light ever witnessed from an object of its kind.

The insanely powerful photons of gamma radiation were produced by a never-before-seen phenomenon surrounding a miniature quasar. The discovery could help us better understand what goes on deep in the chaotic heart of the Milky Way.

SS 433 is a smaller version of the kinds of maelstrom of death you’d find lurking at the core of most galaxies. It’s also in our neighbourhood, more or less, making it relatively easy to study.

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Oct 3, 2018

What If a Coin-Sized Black Hole Appeared On Earth

Posted by in category: cosmology

What trouble could a coin-sized black hole cause?

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Oct 3, 2018

America’s Clergy Are Teaming Up With Scientists

Posted by in categories: cosmology, neuroscience

Scientists and religious leaders joined forces to create programs on neuroscience, cosmology—and even some evolutionary science.

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Oct 2, 2018

Dark stars come into the light

Posted by in category: cosmology

With help from dark matter annihilation, some of the universe’s earliest stars were able to grow much larger than they would otherwise.

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Sep 30, 2018

Scientists Pinpoint Where Dark Matter Is Hiding in the Universe

Posted by in category: cosmology

A new map of dark matter all over the universe could reveal things scientists don’t know about dark energy.

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Sep 27, 2018

Primeval Black Holes Could Reveal How the Universe Formed

Posted by in category: cosmology

Primordial black holes that formed early in the universe’s history could shed light on how exactly the universe formed.

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Sep 26, 2018

Hyper Suprime-Cam survey maps dark matter in the universe

Posted by in category: cosmology

Today, an international group of researchers, including Carnegie Mellon University’s Rachel Mandelbaum, released the deepest wide field map of the three-dimensional distribution of matter in the universe ever made and increased the precision of constraints for dark energy with the Hyper Suprime-Cam survey (HSC).

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Sep 25, 2018

Matter is Going Into this Black Hole at 30% the Speed of Light

Posted by in category: cosmology

How did early black holes grow so quickly? A new study sheds some light on that by observing matter entering a black hole at 30% of the speed of light.

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