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.
|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
Running out of gas: Gas loss puts breaks on stellar baby boom
Understanding the history of star formation in the Universe is a central theme in modern astronomy. Various observations have shown that the star formation activity has varied through the 13.8 billion-year history of the Universe. The stellar birthrate peaked around 10 billion years ago, and has declined steadily since then. However, the cause of the declining stellar birthrate is still not well understood.
Publ.Date : Wed, 02 Aug 2017 08:33:12 EDT
Quasars may answer how starburst galaxies were extinguished
Astronomers have located quasars inside four dusty starburst galaxies. The observations suggest quasars may starve this type of galaxy of energy needed to form stars.
Publ.Date : Mon, 31 Jul 2017 09:54:00 EDT
Glittering stars: Spiral galaxy NGC 4248
This beautiful clump of glowing gas, dark dust and glittering stars is the spiral galaxy NGC 4248, located about 24 million light-years away in the constellation of Canes Venatici (The Hunting Dogs).
Publ.Date : Fri, 28 Jul 2017 13:36:03 EDT
Milky Way's origins are not what they seem
Up to half of the matter in our Milky Way galaxy may come from distant galaxies, astrophysicists have discovered in a first-of-its-kind analysis. As a result, each one of us may be made in part from extragalactic matter. Using supercomputer simulations, the researchers found an unexpected mode for how galaxies acquired matter: intergalactic transfer. Supernova explosions eject copious amounts of gas from galaxies, causing atoms to be transported from one galaxy to another via powerful galactic winds.
Publ.Date : Thu, 27 Jul 2017 14:18:37 EDT
Dawn of the cosmos: Seeing galaxies that appeared soon after the Big Bang
Astronomers have discovered 23 young galaxies, seen as they were 800 million years after the Big Bang.
Publ.Date : Wed, 26 Jul 2017 14:33:51 EDT
Cosmologists produce new maps of dark matter dynamics
New maps of dark matter dynamics in the Universe have been produced by a team of international cosmologists, outlines a new report.
Publ.Date : Tue, 25 Jul 2017 12:21:51 EDT
Construction of massive neutrino experiment kicks off a mile underground
A new era in international particle physics research officially began July 21 with a unique groundbreaking held a mile underground at the Sanford Underground Research Facility in South Dakota. Dignitaries, scientists and engineers from around the world marked the start of construction of a massive international experiment that could change our understanding of the universe. The Long-Baseline Neutrino Facility (LBNF) will house the international Deep Underground Neutrino Experiment (DUNE), which will be built and operated by roughly 1,000 scientists and engineers from 30 countries.
Publ.Date : Mon, 24 Jul 2017 16:21:20 EDT
Superluminous supernova marks the death of a star at cosmic high noon
The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova, one of the most distant ever discovered. The brilliant explosion, more than three times as bright as the 100 billion stars of our Milky Way galaxy combined, occurred about 3.5 billion years after the big bang at a period known as 'cosmic high noon,' when the rate of star formation in the universe reached its peak.
Publ.Date : Fri, 21 Jul 2017 12:25:41 EDT
Flashes of light on dark matter
A web that passes through infinite intergalactic spaces, a dense cosmic forest illuminated by very distant lights and a huge enigma to solve. These are the picturesque ingredients of a scientific research that adds an important element for understanding one of the fundamental components of our Universe: dark matter.
Publ.Date : Fri, 21 Jul 2017 10:13:06 EDT
Best measure of star-forming material in galaxy clusters in early universe
The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration has combined observations from several of the world's most powerful telescopes to carry out one of the largest studies yet of molecular gas -- the raw material which fuels star formation throughout the universe -- in three of the most distant clusters of galaxies ever found, detected as they appeared when the universe was only four billion years old.
Publ.Date : Thu, 20 Jul 2017 13:31:10 EDT
Smallest particles and the vastness of the universe connected
Are density distributions of the vast universe and the nature of smallest particles related? Scientists have now revealed the connection between those two aspects, and argued that our universe could be used as a particle physics 'collider' to study the high energy particle physics. Their findings mark the first step of cosmological collider phenomenology and pave the way for future discovery of new physics unknown yet to humankind.
Publ.Date : Wed, 19 Jul 2017 11:35:32 EDT