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.

 

How to merge two black holes in a simple way
The merger of two black holes, such as the one that produced the gravitational waves discovered by the LIGO Observatory, is considered an extremely complex process that can only be simulated by the world's most powerful supercomputers. However, two theoretical physicists have demonstrated that what occurs on the space-time boundary of the two merging objects can be explained using simple equations, at least when a giant black hole collides with a tiny black hole.
Publ.Date : Mon, 26 Sep 2016 09:59:56 EDT

ALMA Explores the Hubble Ultra Deep Field: Deepest ever millimeter observations of early Universe
International teams of astronomers have used the Atacama Large Millimeter/submillimeter Array (ALMA) to explore the distant corner of the Universe first revealed in the iconic images of the Hubble Ultra Deep Field (HUDF). These new ALMA observations are significantly deeper and sharper than previous surveys at millimetre wavelengths. They clearly show how the rate of star formation in young galaxies is closely related to their total mass in stars. They also trace the previously unknown abundance of star-forming gas at different points in time, providing new insights into the “Golden Age” of galaxy formation approximately 10 billion years ago.
Publ.Date : Thu, 22 Sep 2016 14:16:48 EDT

Cosmology safe as universe has no sense of direction
The universe is expanding uniformly. Space isn't stretching in a preferred direction or spinning.
Publ.Date : Thu, 22 Sep 2016 09:38:23 EDT

In exploring the ‘now,’ new theory links flow of time with Big Bang
A simple question from his wife -- Does physics really allow people to travel back in time? -- propelled a physicist on a quest to resolve a fundamental problem that had puzzled him throughout his 45-year career: Why does the arrow of time flow inexorably toward the future, constantly creating new "nows"?
Publ.Date : Wed, 21 Sep 2016 12:12:34 EDT

Galactic fireworks illuminate monster hydrogen blob in space
An international team of researchers using ALMA and other telescopes has discovered the power source illuminating a so-called Lyman-alpha Blob -- a rare, brightly glowing, and enormous concentration of gas in the distant universe.
Publ.Date : Wed, 21 Sep 2016 08:50:46 EDT

Explaining why the universe can be 'transparent': Universe's reionization is based on a galaxy's dust content
Scientists can explain why the universe has enough energy to become transparent. The study marks the first quantitative study of how the gas content within galaxies scales with the amount of interstellar dust.
Publ.Date : Mon, 12 Sep 2016 17:38:40 EDT

Discovery nearly doubles known quasars from the ancient universe
Quasars are supermassive black holes that sit at the center of enormous galaxies, accreting matter. They shine so brightly that they are often referred to as beacons and are among the most-distant objects we can currently study. A team has discovered 63 new quasars from when the universe was only a billion years old, almost doubling the number of ancient quasars previously known.
Publ.Date : Mon, 12 Sep 2016 08:46:45 EDT

Reconciling dwarf galaxies with dark matter
Dwarf galaxies are enigmas wrapped in riddles. Although they are the smallest galaxies, they represent some of the biggest mysteries about our universe. While many dwarf galaxies surround our own Milky Way, there seem to be far too few of them compared with standard cosmological models, which raises a lot of questions about the nature of dark matter and its role in galaxy formation. New theoretical modeling work offers the most accurate predictions to date about the dwarf galaxies in the Milky Way's neighborhood.
Publ.Date : Wed, 07 Sep 2016 13:51:50 EDT

Hubble discovers rare fossil relic of early Milky Way
A fossilized remnant of the early Milky Way harboring stars of hugely different ages has been revealed by an international team of astronomers. This stellar system resembles a globular cluster, but is like no other cluster known. It contains stars remarkably similar to the most ancient stars in the Milky Way and bridges the gap in understanding between our galaxy's past and its present.
Publ.Date : Wed, 07 Sep 2016 11:23:47 EDT

First gravitational waves form after 10 million years
If two galaxies collide, the merging of their central black holes triggers gravitational waves, which ripple throughout space. An international research team has now calculated that this occurs around 10 million years after the two galaxies merge -- much faster than previously assumed.
Publ.Date : Mon, 05 Sep 2016 06:48:29 EDT

First stars formed even later than previously thought
ESA's Planck satellite has revealed that the first stars in the Universe started forming later than previous observations of the Cosmic Microwave Background indicated. This new analysis also shows that these stars were the only sources needed to account for reionising atoms in the cosmos, having completed half of this process when the Universe had reached an age of 700 million years.
Publ.Date : Fri, 02 Sep 2016 12:58:59 EDT

The rise and fall of galaxy formation
Astronomers have charted the rise and fall of galaxies over 90 percent of cosmic history. The FourStar Galaxy Evolution Survey has built a multicolored photo album of galaxies as they grow from their faint beginnings into mature and majestic giants. They did so by measuring distances and brightnesses for more than 70,000 galaxies spanning more than 12 billion years of cosmic time, revealing the breadth of galactic diversity.
Publ.Date : Tue, 30 Aug 2016 13:12:02 EDT

Can one cosmic enigma help solve another?
Astrophysicists have proposed a clever new way to shed light on the mystery of dark matter, believed to make up most of the universe. The irony is they want to try to pin down the nature of this unexplained phenomenon by using another, an obscure cosmic emanation known as 'fast radio bursts.'
Publ.Date : Wed, 24 Aug 2016 16:02:55 EDT

Cosmic neighbors inhibit star formation, even in the early universe
Researchers have discovered four of the most distant clusters of galaxies ever found, as they appeared when the universe was only 4 billion years old. This sample is now providing the best measurement yet of when and how fast galaxy clusters stop forming stars in the early universe.
Publ.Date : Wed, 24 Aug 2016 13:55:21 EDT

How we escaped the Big Bang: New theory on moving through time
A physicist is challenging the conventional view of space and time to show how the world advances through time. In her new research, she argues that T violation, or a violation of time reversal (T) symmetry, is forcing the universe and us in it, into the future.
Publ.Date : Wed, 17 Aug 2016 10:15:28 EDT

Ten trillionths of your suntan comes from beyond our galaxy
Astronomers have accurately measured the light hitting the Earth from outside our galaxy and determined that 10 trillionths of your suntan comes from beyond our galaxy.
Publ.Date : Thu, 11 Aug 2016 19:07:51 EDT

Hubble uncovers a galaxy pair coming in from the wilderness
Two tiny dwarf galaxies have been observed that have wandered from a vast cosmic wilderness into a nearby 'big city' packed with galaxies. After being quiescent for billions of years, they are ready to party by starting a firestorm of star birth.
Publ.Date : Thu, 11 Aug 2016 14:26:37 EDT

Much ado about nothing: Astronomers use empty space to study the universe
An international team of astronomers reports that they were able to achieve four times better precision in measurements of how the universe's visible matter is clustered together by studying the empty spaces in between.
Publ.Date : Thu, 11 Aug 2016 14:26:34 EDT

Insight into why the universe is dominated by matter and why we exist
New findings reveal why the universe is dominated by matter and why we exist and how matter and antimatter are different.
Publ.Date : Sun, 07 Aug 2016 08:41:01 EDT

Do black holes have a back door?
One of the biggest problems when studying black holes is that the laws of physics as we know them cease to apply in their deepest regions. Large quantities of matter and energy concentrate in an infinitely small space, the gravitational singularity, where space-time curves towards infinity and all matter is destroyed. Or is it? A recent study suggests that matter might in fact survive its foray into these space objects and come out the other side.
Publ.Date : Fri, 05 Aug 2016 08:57:47 EDT