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Archive for the ‘cosmology’ category: Page 378

Nov 17, 2016

Stephen Hawking: Humans will die out within 1,000 years unless we leave Earth

Posted by in categories: cosmology, habitats

Professor Stephen Hawking has warned that mankind will not survive another millenia unless it makes a home beyond Earth’s atmosphere.

The celebrated physicist was addressing a lecture audience at the Oxford Union debating society on Monday evening when he gave the stark warning.

“Most recent advances in cosmology have been achieved from space where there are uninterrupted views of our Universe,” he said “but we must also continue to go into space for the future of humanity.

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Nov 10, 2016

What Sonic Black Holes Say About Real Ones

Posted by in categories: cosmology, quantum physics

Can a fluid analogue of a black hole point physicists toward the theory of quantum gravity, or is it a red herring?

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Nov 9, 2016

Wormhole entanglement solves black hole paradox

Posted by in category: cosmology

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Nov 7, 2016

A Universe in a Nutshell: The Physics of Everything, with Michio Kaku

Posted by in categories: cosmology, information science, physics

What if we could find one single equation that explains every force in the universe? Professor Michio Kaku explores how physics could potentially shrink the science of the big bang into an equation as small as E=mc².

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Nov 7, 2016

Supernovas Close to Home

Posted by in categories: cosmology, evolution

The death throes of nearby stars might have influenced evolution on Earth.

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Nov 7, 2016

Units of measure are getting a fundamental upgrade

Posted by in category: cosmology

And a shifting speed of light could revise current views about the evolution of the infant universe. Scientists think that a period of inflation caused the newborn cosmos to expand extremely rapidly, creating a universe that is uniform across vast distances. That uniformity is in line with observations: The cosmic microwave background, light that emerged about 380,000 years after the Big Bang, is nearly the same temperature everywhere scientists look. But cosmologist João Magueijo of Imperial College London has a radical alternative to inflation: If light were speedier in the early universe, it could account for the universe’s homogeneity.

“As soon as you raise the speed limit in the early universe,” Magueijo says, “you start being able to work on explanations for why the universe is the way it is.”

A finely tuned universe.

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Nov 5, 2016

This New Hypothesis Claims to Solve 5 of the Biggest Problems in Physics

Posted by in categories: cosmology, particle physics

Physicists have come up with a new model that they say solves five of the biggest unanswered questions in modern physics, explaining the weirdness of dark matter, neutrino oscillations, baryogenesis, cosmic inflation, and the strong CP problem all at once.

The new model, called SMASH, proposes that we only need six new particles to reconcile all of these gaps in the standard model of physics, and the team behind it says it won’t be that hard to test.

The model has been developed by a team of French and German physicists, and they say it doesn’t require any major tweaks to the standard model — just a few new additions.

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Nov 4, 2016

Scientists will try to directly image Sagittarius A*, the black hole at the center of the Milky Way

Posted by in category: cosmology

How do you directly image a supermassive black hole at the center of a galaxy? Using a telescope with the effective size of the Earth.

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Nov 3, 2016

Scientists May Have Identified the Particles That Make Up Dark Matter

Posted by in categories: cosmology, particle physics, supercomputing

In Brief:

  • Using an advanced supercomputer, scientists came up with a profile for dark matter, concluding that it may be made of axions of a specific type.
  • With this new information, the race is on to be the first to prove the existence of dark matter particles.

Understanding what dark matter is has proven to be amazingly difficult. Of course, one might expect this from a thing that is, for all intents and purposes, entirely invisible. Scientists have come to the conclusion that dark matter exists by observing the way gravity behaves—either our model of gravity is in need of an update, or dark matter exists. The latter is the most likely conclusion.

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Nov 2, 2016

A Supercomputer Just Solved A Big Mystery Behind Dark Matter

Posted by in categories: cosmology, particle physics, supercomputing

We now know the mass of an axion, which means we might be able to prove dark matter does indeed exist.

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