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 orbits in the local supercluster
Astronomers have produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1,400 galaxies within 100 million light years of the Milky Way. The team reconstructed the galaxies' motions from 13 billion years in the past to the present day.
Publ.Date : Fri, 08 Dec 2017 09:55:55 EST

Black holes' magnetism surprisingly wimpy
Black holes are famous for their muscle: an intense gravitational pull known to gobble up entire stars and launch streams of matter into space at almost the speed of light. It turns out the reality may not live up to the hype.
Publ.Date : Thu, 07 Dec 2017 14:16:44 EST

Galaxy growth in a massive halo in the first billion years of cosmic history
Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought.
Publ.Date : Thu, 07 Dec 2017 14:07:17 EST

Heavy metal: How first supernovae altered early star formation
An international team of researchers ran multi-scale, multi-physics 2-D and 3-D simulations to illustrate how heavy metals expelled from exploding supernovae held the first stars in the universe regulate subsequent star formation and influence the appearance of galaxies in the process.
Publ.Date : Wed, 06 Dec 2017 14:23:41 EST

ALMA finds massive primordial galaxies swimming in vast ocean of dark matter
New observations push back the epoch of massive-galaxy formation even further by identifying two giant galaxies seen when the universe was only 780 million years old, or about 5 percent its current age.
Publ.Date : Wed, 06 Dec 2017 13:20:28 EST

Scientists observe supermassive black hole in infant universe
A team of astronomers has detected the most distant supermassive black hole ever observed. The black hole sits in the center of an ultrabright quasar and presents a puzzle as to how such a huge object could have grown so quickly.
Publ.Date : Wed, 06 Dec 2017 13:19:46 EST

Astronomer's map reveals location of mysterious fast-moving gas
The most detailed map ever of clouds of high-velocity gas in the universe around us has now been developed by scientsits. The map covers the entire sky and shows curious clouds of neutral hydrogen gas that are moving at a different speed to the normal rotation of the Milky Way.
Publ.Date : Mon, 04 Dec 2017 09:12:13 EST

Gravitational waves could shed light on the origin of black holes
The detection of gravitational waves has given astronomers a new way of looking at the universe, and a new study shows how these ripples in the fabric of spacetime might confirm or rule out the existence of a certain type of black hole.
Publ.Date : Thu, 30 Nov 2017 14:10:43 EST

MUSE probes uncharted depths of Hubble Ultra Deep Field
Astronomers using the MUSE instrument on ESO's Very Large Telescope in Chile have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies including 72 galaxies that have never been detected before. This wealth of new information is giving astronomers insight into star formation in the early Universe.
Publ.Date : Wed, 29 Nov 2017 09:02:43 EST

Why is massive star formation quenched in galaxy centers?
A new study proposes that one of the reasons that slows down the rate at which massive stars form in galaxies is the existence of relatively large magnetic fields. Research has revealed that this process occurs around the center of the galaxy NGC 1097.
Publ.Date : Tue, 28 Nov 2017 12:33:48 EST

Possible vestiges of a universe previous to the Big Bang
A researcher proposes to eliminate the need for cosmological space-time singularity and argues that the current expansion phase was preceded by contraction.
Publ.Date : Mon, 27 Nov 2017 10:59:35 EST

How Earth stops high-energy neutrinos in their tracks
For the first time, a science experiment has measured Earth's ability to absorb neutrinos -- the smaller-than-an-atom particles that zoom throughout space and through us by the trillions every second at nearly the speed of light. The experiment was achieved with the IceCube detector, an array of 5,160 basketball-sized sensors frozen deep within a cubic kilometer of very clear ice near the South Pole.
Publ.Date : Wed, 22 Nov 2017 13:13:59 EST

Dark matter and dark energy: Do they really exist?
Researchers have hypothesized that the universe contains a 'dark matter.' They have also posited the existence of a 'dark energy.' These two hypotheses account for the movement of stars in galaxies and for the accelerating expansion of the universe. But, according to a researcher, these concepts may be no longer valid: the phenomena can be demonstrated without them. This research exploits a new theoretical model based on the scale invariance of the empty space.
Publ.Date : Wed, 22 Nov 2017 11:30:13 EST

What is the computational power of the universe?
Can a close look at the universe give us solutions to problems too difficult for a computer -- even if we built a computer larger than a planet? Physicist Stephen Jordan reflects on this question in a new NIST video, along with a scientific paper that considers one particular tough problem the universe might answer.
Publ.Date : Wed, 15 Nov 2017 15:36:40 EST

Hunt for dark matter is narrowed
Scientists have disproved the existence of a specific type of axion -- an important candidate 'dark matter' particle -- across a wide range of its possible masses.
Publ.Date : Wed, 15 Nov 2017 12:46:23 EST

Duo of titanic galaxies captured in extreme starbursting merger
Astronomers have uncovered the never-before-seen close encounter between two astoundingly bright and spectacularly massive galaxies in the early universe.
Publ.Date : Mon, 13 Nov 2017 12:36:33 EST

Stellar explosions and cosmic 'recipe' for nearby universe
Thanks to an in-depth look into the composition of gas in the Perseus galaxy cluster, Japan's Hitomi mission has given scientists new insights into the stellar explosions that formed its chemical elements.
Publ.Date : Mon, 13 Nov 2017 12:36:31 EST

Anatomy of a cosmic snake reveals structure of distant galaxies
We have a fair understanding of star formation, from the interstellar matter to the diffuse clouds whose gravitational contraction gives birth to stars. But observations of distant galaxies have questioned this picture, the size and mass of these distant stellar nurseries exceeding that of their local counterparts. Astrophysicists have tackled this inconsistency and found the first answers thanks to the observation of the cosmic snake.
Publ.Date : Mon, 13 Nov 2017 11:11:23 EST

Winds blowing off a dying star
Stars like our Sun eject large amounts of gas and dust into space, containing various elements and compounds. Asymptotic giant branch -- AGB -- phase stars, near their end of life, are particularly significant sources of such substances in our galaxy.
Publ.Date : Fri, 10 Nov 2017 08:43:10 EST

One of the oldest objects in the universe observed
Astronomers report that they have detected the second most distant dusty, star-forming galaxy ever found in the universe -- born in the first one billion years after the Big Bang. It is the oldest object ever detected by the LMT.
Publ.Date : Mon, 06 Nov 2017 11:23:09 EST