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.

 

Embryonic cluster galaxy immersed in giant cloud of cold gas
Astronomers studying a cluster of still-forming protogalaxies seen as they were more than 10 billion years ago have found that a giant galaxy in the center of the cluster is forming from a surprisingly-dense soup of molecular gas.
Publ.Date : Thu, 01 Dec 2016 16:46:58 EST

Tangled threads weave through cosmic oddity
New observations from the NASA/ESA Hubble Space Telescope have revealed the intricate structure of the galaxy NGC 4696 in greater detail than ever before. The elliptical galaxy is a beautiful cosmic oddity with a bright core wrapped in system of dark, swirling, thread-like filaments.
Publ.Date : Thu, 01 Dec 2016 12:02:40 EST

Astronomers watch star clusters spewing out dust
Galaxies are often thought of as sparkling with stars, but they also contain gas and dust. Now, a team of astronomers has used new data to show that stars are responsible for producing dust on galactic scales, a finding consistent with long-standing theory. Dust is important because it is a key component of rocky planets such as Earth.
Publ.Date : Thu, 01 Dec 2016 11:55:05 EST

Star of Bethlehem may not be a star after all
Studying historical, astronomical and biblical records, Grant Mathews, University of Notre Dame professor, believes the event that led the Magi was an extremely rare planetary alignment occurring in 6 B.C., and the likes of which may never be seen again.
Publ.Date : Thu, 01 Dec 2016 11:25:50 EST

Violent collision of massive supernova with surrounding gas powers superluminous supernovae
Scientists have simulated the violent collisions between supernovae and its surrounding gas -- which is ejected before a supernova explosion, thereby giving off an extreme brightness.
Publ.Date : Mon, 28 Nov 2016 08:45:10 EST

New network to trace the evolution of the universe
A new network will bring European research, science and business together to further our understanding of the early universe and its constituents, say authors of a new report.
Publ.Date : Thu, 24 Nov 2016 08:17:40 EST

Large number of dwarf galaxies discovered in the early universe
Astronomers have found, for the first time, a large population of distant dwarf galaxies that could reveal important details about a productive period of star formation in the universe billions of years ago.
Publ.Date : Mon, 21 Nov 2016 16:19:15 EST

Birth of massive stars is accompanied by strong luminosity bursts
Astronomers are investigating the basic principles of the formation of stars. The birth of massive stars is still a mystery to us, because these stars are embedded in an extremely dense medium of gas and dust.
Publ.Date : Mon, 07 Nov 2016 11:24:23 EST

Detour via gravitational lens makes distant galaxy visible
Never before have astrophysicists measured light of such high energy from a celestial object so far away. Around 7 billion years ago, a huge explosion occurred at the black hole in the center of a galaxy. This was followed by a burst of high-intensity gamma rays. A number of telescopes have succeeded in capturing this light. An added bonus: it was thus possible to reconfirm Einstein's General Theory of Relativity, as the light rays encountered a less distant galaxy en route to Earth -- and were deflected by this so-called gravitational lens.
Publ.Date : Fri, 04 Nov 2016 19:06:59 EDT

Supercomputer comes up with a profile of dark matter
In the search for the mysterious dark matter, physicists have used elaborate computer calculations to come up with an outline of the particles of this unknown form of matter. To do this, the scientists extended the successful Standard Model of particle physics which allowed them, among other things, to predict the mass of so-called axions, promising candidates for dark matter.
Publ.Date : Wed, 02 Nov 2016 14:44:36 EDT

Physicists make it possible to 3D print your own baby universe
Researchers have created a 3D printed cosmic microwave background - a map of the oldest light in the universe - and provided the files for download.
Publ.Date : Fri, 28 Oct 2016 08:58:21 EDT

Cosmic horseshoe is not the lucky beacon
Although the universe started out with a bang it quickly evolved to a relatively cool, dark place. After a few hundred thousand years the lights came back on and scientists are still trying to figure out why.
Publ.Date : Wed, 26 Oct 2016 13:46:54 EDT

Unexpected giant glowing halos discovered around distant quasars
Astronomers have discovered glowing gas clouds surrounding distant quasars. This new survey indicates that halos around quasars are far more common than expected. The properties of the halos in this surprising find are also in striking disagreement with currently accepted theories of galaxy formation in the early Universe.
Publ.Date : Wed, 26 Oct 2016 08:11:38 EDT

The universe is expanding at an accelerating rate, or is it?
Five years ago, the Nobel Prize in Physics was awarded to three astronomers for their discovery that the universe is expanding at an accelerating pace. This led to the widespread acceptance of the idea that the universe is dominated by a mysterious substance named 'dark energy' that drives this accelerating expansion. Now, a team of scientists has cast doubt on this standard cosmological concept. The evidence for acceleration may be flimsier than previously thought, they say, with the data being consistent with a constant rate of expansion.
Publ.Date : Fri, 21 Oct 2016 12:32:38 EDT

Astrophysicists map the Milky Way
Hydrogen. Atomic number 1. It is the simplest and lightest element on the periodic table, but don't be fooled by its humble appearance. With just a single proton and a single electron, it is the most abundant element in the universe and has fueled star formation for the past 13 billion years. Now scientists have mapped the key ingredient's distribution across the Milky Way, revealing details about our galaxy that have never been seen before.
Publ.Date : Wed, 19 Oct 2016 18:50:09 EDT

Observable universe contains two trillion galaxies, 10 times more than previously thought
Using data from deep-space surveys taken by NASA's Hubble Space Telescope and other observatories, astronomers have performed a census of the number of galaxies in the universe. The team came to the surprising conclusion that there are at least 10 times as many galaxies in the observable universe than previously thought. The results have clear implications for our understanding of galaxy formation, and also helps shed light on an ancient astronomical paradox -- why is the sky dark at night?
Publ.Date : Thu, 13 Oct 2016 11:17:09 EDT

Dense molecular gas disks drive the growth of supermassive black holes: Are supernova explosions the key?
Astronomers have revealed that dense molecular gas disks a few hundred light years in scale located at the centers of galaxies supply gas to supermassive black holes situated within them. This finding provides important insights on the growth of supermassive black holes over cosmic time.
Publ.Date : Thu, 13 Oct 2016 09:57:52 EDT

Cosmological mystery solved by largest ever map of voids and superclusters
Astrophysicists have created the largest ever map of voids and superclusters in the Universe, which helps solve a long-standing cosmological mystery.
Publ.Date : Wed, 12 Oct 2016 09:58:19 EDT

Using oxygen as a tracer of galactic evolution
A new study casts light on how young, hot stars ionize oxygen in the early universe and the effects on the evolution of galaxies through time. The study presents the first measurements of the changing strengths of oxygen emission lines from the present day and back to 12.5 billion years ago. The main conclusions are that the strength of doubly ionized oxygen increases going back in time, while the strength of singly ionized oxygen increases up to 11 billion years ago and then decreases for the remaining one to two billion years.
Publ.Date : Fri, 07 Oct 2016 09:34:57 EDT

Detonating white dwarfs as supernovae
A new mathematical model created by astrophysicists details a way that dead stars called white dwarfs could detonate, producing a type of explosion that is instrumental to measuring the extreme distances in our universe. The mechanism could improve our understanding of how Type Ia supernovae form.
Publ.Date : Tue, 04 Oct 2016 13:43:10 EDT