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.

 

Galaxy murder mystery
It’s the big astrophysical whodunnit. Across the Universe, galaxies are being killed and the question scientists want answered is, what’s killing them?
Publ.Date : Mon, 16 Jan 2017 16:06:20 EST

Presumed young star turns out to be a galactic senior citizen
49 Lib, a relatively bright star in the southern sky, is twelve billion years old rather than just 2.3 billion. For many decades, researchers were stumped by conflicting data pertaining to this celestial body, because they had estimated it as much younger than it really is. Determining its age anew, astronomers have now successfully resolved all inconsistencies.
Publ.Date : Mon, 16 Jan 2017 09:20:35 EST

Understanding blended galaxies
Galaxies are merging all the time, even our own galaxy, the Milky Way. But how these mergers occur isn't entirely clear. An American astrophysicist will use a National Science Foundation grant to find and characterize supermassive black holes associated with merging galaxies.
Publ.Date : Thu, 12 Jan 2017 14:33:19 EST

Struggle to escape distant galaxies creates giant halos of scattered photons
Astronomers have discovered giant halos around early Milky Way type galaxies, made of photons (elementary particles of light) that have struggled to escape them.
Publ.Date : Wed, 11 Jan 2017 09:14:23 EST

High energy x-rays used to peer beneath the obscuring skin of growing black holes
A black hole under investigation is so hidden that it requires highly sensitive observations in the highest energy X-rays to classify it as obscured. But they give themselves away when material they feed on emits high-energy X-rays that NASA's NuSTAR (Nuclear Spectroscopic Telescope Array) mission can detect. That's how astronomers used NuSTAR to recently identify a gas-enshrouded supermassive black holes located at the center of a nearby galaxy IC 3639 some 175 million light years from Earth.
Publ.Date : Sun, 08 Jan 2017 13:05:59 EST

Research supports role of supernovas in measuring pace at which the universe expands
A team of research scientists recently published a paper marking the importance of Type Ia supernovas in measuring the pace at which the universe expands. Type Ia supernovas are among the very brightest cosmic explosions visible, signaling the death of stars, and their importance to cosmology cannot be understated.
Publ.Date : Fri, 06 Jan 2017 16:29:56 EST

Astronomers discover cosmic double whammy
Astronomers have discovered a cosmic one-two punch never seen before. By combining data from some of the best X-ray, optical and radio telescopes in the world, researchers have found out what happens when matter ejected by a giant black hole is swept up in the merger of two enormous galaxy clusters.
Publ.Date : Fri, 06 Jan 2017 09:23:57 EST

Deepest X-ray image ever reveals black hole treasure trove
An unparalleled image from NASA's Chandra X-ray Observatory is giving astronomers the best look yet at the growth of black holes over billions of years beginning soon after the Big Bang. This is the deepest X-ray image ever obtained, collected with about 7 million seconds, or 11 and a half weeks, of Chandra observing time.
Publ.Date : Thu, 05 Jan 2017 14:34:58 EST

Role of supernovae in clocking the universe
New research by cosmologists confirms the accuracy of Type Ia supernovae in measuring the pace at which the universe expands. The findings support a widely held theory that the expansion of the universe is accelerating and such acceleration is attributable to dark energy. The findings counter recent headlines that Type Ia supernova cannot be relied upon to measure the expansion of the universe.
Publ.Date : Wed, 04 Jan 2017 14:36:07 EST

Supercluster of galaxies near Milky Way
Astronomers have found one of the Universe's biggest superclusters of galaxies near the Milky Way. The Vela supercluster, which had previously gone undetected as it was hidden by stars and dust in the Milky Way, is a huge mass that influenced the motion of our Galaxy.
Publ.Date : Wed, 21 Dec 2016 09:14:27 EST

First light for band 5 at ALMA
The Atacama Large Millimeter/submillimeter Array (ALMA) in Chile has begun observing in a new range of the electromagnetic spectrum. This has been made possible thanks to new receivers installed at the telescope's antennas, which can detect radio waves with wavelengths from 1.4 to 1.8 millimeters -- a range previously untapped by ALMA. This upgrade allows astronomers to detect faint signals of water in the nearby Universe.
Publ.Date : Wed, 21 Dec 2016 09:14:05 EST

First look at birthplaces of most current stars
Distant galaxies can be seen as they were when most of today's stars were being born, report scientists, answering longstanding questions about mechanisms of star formation billions of years ago.
Publ.Date : Tue, 20 Dec 2016 14:09:02 EST

Festive nebulae light up Milky Way Galaxy satellite
The sheer observing power of the NASA/ESA Hubble Space Telescope is rarely better illustrated than in an image such as this. This glowing pink nebula, named NGC 248, is located in the Small Magellanic Cloud, just under 200 000 light-years away and yet can still be seen in great detail.
Publ.Date : Tue, 20 Dec 2016 14:08:59 EST

New antimatter breakthrough to help illuminate mysteries of the Big Bang
Physicists have conducted the first precision study of antihydrogen, the antimatter equivalent of hydrogen.
Publ.Date : Tue, 20 Dec 2016 09:51:15 EST

Astronomers release largest digital survey of the visible universe
The world's largest digital survey of the visible Universe, mapping billions of stars and galaxies, has been publicly released.
Publ.Date : Mon, 19 Dec 2016 12:02:07 EST

No trace of dark matter in gamma-ray background
Researchers have just published the most precise analysis of the fluctuations in the gamma-ray background to date. By making use of more than six years of data, the researchers found two different source classes contributing to the gamma-ray background. No traces of a contribution of dark matter particles were found in the analysis.
Publ.Date : Mon, 19 Dec 2016 08:50:20 EST

Population of neutron stars can generate gravitational waves continuously
A population of neutron stars has a spin rate that is much higher than that calculated by the conventional method, say scienitsts. Gravitational waves continuously emitted by the star bring this high spin rate down to within the observed range.
Publ.Date : Wed, 14 Dec 2016 11:50:20 EST

Magnetic mirror could shed new light on gravitational waves and the early universe
Researchers have created a new magnetic mirror-based device that could one day help cosmologists discover new details about ripples in space-time known as gravitational waves, particularly those emitted when the universe was extremely young.
Publ.Date : Tue, 13 Dec 2016 11:31:47 EST

Dark matter may be smoother than expected
Analysis of a giant new galaxy survey suggests that dark matter may be less dense and more smoothly distributed throughout space than previously thought. An international team used data from the Kilo Degree Survey (KiDS) to study how the light from about 15 million distant galaxies was affected by the gravitational influence of matter on the largest scales in the universe.
Publ.Date : Wed, 07 Dec 2016 09:29:10 EST

Second-generation stars identified, giving clues about their predecessors
Astronomers have identified what they believe to be the second generation of stars, shedding light on the nature of the universe's first stars.
Publ.Date : Tue, 06 Dec 2016 15:56:38 EST