Cosmology News

Courtesy of Science Daily

Welcome to Sea and Sky's Cosmology News. Here you can find links to the latest space news headlines about cosmology and astrophysics. Click on any yellow title below to view the full news article. The news article will open in a new browser window. Simply close the browser window when you are finished reading the article to return to the news article listing. You can use the "Click for More" link to go to a page with more news headlines.

 

Is the Milky Way an 'outlier' galaxy? Studying its 'siblings' for clues
The most-studied galaxy in the universe -- the Milky Way -- might not be as 'typical' as previously thought, according to a new study. Early results from the Satellites Around Galactic Analogs (SAGA) Survey indicate that the Milky Way's satellites are much more tranquil than other systems of comparable luminosity and environment. Many satellites of those 'sibling' galaxies are actively pumping out new stars, but the Milky Way's satellites are mostly inert.
Publ.Date : Wed, 20 Sep 2017 11:33:52 EDT

New supernova analysis reframes dark energy debate
The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research. The new study finds the fit of Type Ia supernovae to a model universe with no dark energy to be very slightly better than the fit to the standard dark energy model.
Publ.Date : Wed, 13 Sep 2017 19:31:48 EDT

Explosive birth of stars swells galactic cores
Astronomers found that active star formation upswells galaxies, like yeast helps bread rise. Using three powerful telescopes on the ground and in orbit, they observed galaxies from 11 billion years ago and found explosive formation of stars in the cores of galaxies. This suggests that galaxies can change their own shape without interaction with other galaxies.
Publ.Date : Sun, 10 Sep 2017 23:25:17 EDT

Unique study tests fundamental laws of physics
A study that will ‘test our understanding of how the Universe works, particularly outside the relatively narrow confines of our planet’ is being undertaken by an international team of researchers.
Publ.Date : Tue, 05 Sep 2017 12:54:21 EDT

Crab nebula in the limelight: Unified model for the entire radiation spectrum
The origin of cosmic rays, high-energy particles from outer space constantly impacting on Earth, is among the most challenging open questions in astrophysics. Now research sheds new light on the origin of those energetic particles.
Publ.Date : Tue, 05 Sep 2017 12:48:03 EDT

Stellar corpse sheds light on origin of cosmic rays
New research revealed that the entire zoo of electromagnetic radiation streaming from the Crab nebula -- one of the most iconic objects in the sky -- has its origin in one population of electrons and must be produced in a different way than scientists have traditionally thought. The results have implications for our understanding of how cosmic rays attain their incredible energies.
Publ.Date : Mon, 04 Sep 2017 09:34:52 EDT

Physicists propose new theories of black holes from the very early universe
'Primordial black holes,' believed to have formed shortly after the Big Bang, might explain how heavy elements such as gold, platinum and uranium came to be, physicists report.
Publ.Date : Fri, 01 Sep 2017 13:55:18 EDT

Star-formation ‘fuel tanks’ found around distant galaxies
Astronomers have studied six distant starburst galaxies and discovered that five of them are surrounded by turbulent reservoirs of hydrogen gas, the fuel for future star formation.
Publ.Date : Wed, 30 Aug 2017 17:25:00 EDT

Artificial intelligence analyzes gravitational lenses 10 million times faster
Researchers have for the first time shown that neural networks -- a form of artificial intelligence -- can accurately analyze the complex distortions in spacetime known as gravitational lenses 10 million times faster than traditional methods.
Publ.Date : Wed, 30 Aug 2017 13:22:22 EDT

What lit up the universe? Black holes may have punctured darkened galaxies, allowing light to escape
Researchers have a new explanation for how the universe changed from darkness to light. They propose that black holes within galaxies produce winds strong enough to fling out matter that punctures holes in galaxies, allowing light to escape.
Publ.Date : Wed, 30 Aug 2017 11:48:00 EDT

Galaxy 5 billion light-years away shows we live in a magnetic universe
A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies.
Publ.Date : Mon, 28 Aug 2017 12:45:20 EDT

Cosmic velocity web: Motions of thousands of galaxies mapped
The cosmic web -- the distribution of matter on the largest scales in the universe -- has usually been defined through the distribution of galaxies. Now, a new study by a team of astronomers demonstrates a novel approach. Instead of using galaxy positions, they mapped the motions of thousands of galaxies.
Publ.Date : Tue, 15 Aug 2017 09:51:32 EDT

Where is everybody? The implications of cosmic silence
If the potential for intelligent life to exist somewhere in the universe is so large, then where is everybody? In a new paper, an astrophysicist argues that species such as ours go extinct soon after attaining high levels of technology.
Publ.Date : Fri, 11 Aug 2017 18:54:55 EDT

New theory on the origin of dark matter
Scientists have come up with a new theory on how dark matter may have been formed shortly after the origin of the universe. This new model proposes an alternative to the WIMP paradigm that is the subject of various experiments in current research.
Publ.Date : Tue, 08 Aug 2017 14:59:31 EDT

Scientists probe the conditions of stellar interiors to measure nuclear reactions
Most of the nuclear reactions that drive the nucleosynthesis of the elements in our universe occur in very extreme stellar plasma conditions. This intense environment found in the deep interiors of stars has made it nearly impossible for scientists to perform nuclear measurements in these conditions -- until now.
Publ.Date : Mon, 07 Aug 2017 16:44:41 EDT

Primordial black holes may have helped to forge heavy elements
Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis. But what about the heavier elements in the periodic chart, elements such as gold, platinum and uranium? Astronomers believe most of these "r-process elements" -- elements much heavier than iron -- were created, either in the aftermath of the collapse of massive stars and the associated supernova explosions, or in the merging of binary neutron star systems.
Publ.Date : Fri, 04 Aug 2017 13:18:16 EDT

Possible explanation for the dominance of matter over antimatter in the Universe
Neutrinos and antineutrinos, sometimes called ghost particles because difficult to detect, can transform from one type to another. The international T2K Collaboration announces a first indication that the dominance of matter over antimatter may originate from the fact that neutrinos and antineutrinos behave differently during those oscillations. This is an important milestone towards the understanding of our Universe.
Publ.Date : Fri, 04 Aug 2017 08:31:09 EDT

First observation of the hyperfine splitting in antihydrogen
Scientists are one step closer to answering the question of why matter exists and illuminating the mysteries of the Big Bang and the birth of the universe.
Publ.Date : Thu, 03 Aug 2017 12:27:41 EDT

Dark Energy Survey reveals most accurate measurement of universe's dark matter
Dark Energy Survey scientists have unveiled the most accurate measurement ever made of the present large-scale structure of the universe. These measurements of the amount and 'clumpiness' (or distribution) of dark matter in the present-day cosmos were made with a precision that, for the first time, rivals that of inferences from the early universe by the European Space Agency's orbiting Planck observatory.
Publ.Date : Thu, 03 Aug 2017 12:06:20 EDT

New simulations could help in hunt for massive mergers of neutron stars, black holes
Scientists have developed new computer models to explore what happens when a black hole joins with a neutron star - the superdense remnant of an exploded star.
Publ.Date : Wed, 02 Aug 2017 13:47:45 EDT