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.

 

Vast luminous nebula poses a cosmic mystery
Astronomers have found an enormous, glowing blob of gas in the distant universe, with no obvious source of power for the light it is emitting. Called an 'enormous Lyman-alpha nebula' (ELAN), it is the brightest and among the largest of these rare objects, only a handful of which have been observed.
Publ.Date : Thu, 23 Feb 2017 12:43:25 EST

Possible dark matter ties in Andromeda Galaxy
NASA's Fermi Gamma-ray Space Telescope has found a signal at the center of the neighboring Andromeda galaxy that could indicate the presence of the mysterious stuff known as dark matter. The gamma-ray signal is similar to one seen by Fermi at the center of our own Milky Way galaxy.
Publ.Date : Wed, 22 Feb 2017 08:23:11 EST

Mapping the family tree of stars
Astronomers are borrowing principles applied in biology and archaeology to build a family tree of the stars in the galaxy. By studying chemical signatures found in the stars, they are piecing together these evolutionary trees looking at how the stars formed and how they are connected to each other. The signatures act as a proxy for DNA sequences. It's akin to chemical tagging of stars and forms the basis of a discipline astronomers refer to as Galactic archaeology.
Publ.Date : Mon, 20 Feb 2017 19:16:22 EST

Radial acceleration relation found in all common types of galaxies
The distribution of normal matter precisely determines gravitational acceleration in all common types of galaxies, a team of researchers reports. This provides further support that the relation is tantamount to a new natural law, the researchers say.
Publ.Date : Fri, 17 Feb 2017 01:25:02 EST

Black-hole-powered jets forge fuel for star formation
Astronomers have discovered a surprising connection between a supermassive black hole and the galaxy where it resides. Powerful radio jets from the black hole - which normally suppress star formation - are stimulating the production of cold gas in the galaxy's extended halo of hot gas. This newly identified supply of cold, dense gas could eventually fuel future star birth as well as feed the black hole itself.
Publ.Date : Tue, 14 Feb 2017 13:05:20 EST

What drives universe's expansion?
Experiments with advanced technology could soon test an idea developed by Albert Einstein almost exactly a century ago, and settle a longstanding puzzle over what is driving the accelerated expansion of the universe.
Publ.Date : Fri, 10 Feb 2017 13:09:30 EST

Ancient signals from the early universe
For the first time, theoretical physicists have calculated the signal of specific gravitational wave sources that emerged fractions of a second after the Big Bang. The source of the signal is a long-lost cosmological phenomenon called 'oscillon.'
Publ.Date : Fri, 10 Feb 2017 13:09:27 EST

Simulations reveal the invisible chaos of superluminous supernovae
To better understand the physical conditions that create superluminious supernova, astrophysicists are running 2D simulations of these events using supercomputers at National Energy Research Scientific Computing Center (NERSC) and newly developed CASTRO code.
Publ.Date : Thu, 02 Feb 2017 09:04:55 EST

Tracing the cosmic web with star-forming galaxies in the distant universe
A research group has revealed a picture of the increasing fraction of massive star-forming galaxies in the distant universe. Massive star-forming galaxies in the distant universe, about 5 billion years ago, trace large-scale structure in the universe. In the nearby universe, about 3 billion years ago, massive star-forming galaxies are not apparent. This change is consistent with the picture of galaxy evolution established by other independent studies.
Publ.Date : Tue, 31 Jan 2017 12:42:09 EST

NASA's Fermi discovers the most extreme blazars yet
NASA's Fermi Gamma-ray Space Telescope has identified the farthest gamma-ray blazars, a type of galaxy whose intense emissions are powered by supersized black holes. Light from the most distant object began its journey to us when the universe was 1.4 billion years old, or nearly 10 percent of its present age.
Publ.Date : Mon, 30 Jan 2017 22:47:43 EST

Cosmic dust that formed our planets traced to giant stars
Scientists have identified the origin of key stardust grains present in the dust cloud from which the planets in our Solar System formed, a study suggests.
Publ.Date : Mon, 30 Jan 2017 13:34:15 EST

Both push and pull drive our galaxy's race through space
What is propelling the Milky Way's race through space? By 3-D mapping the flow of galaxies through space, researchers found that the Milky Way galaxy is speeding away from a large, previously unidentified region of low density.
Publ.Date : Mon, 30 Jan 2017 11:09:21 EST

Substantial evidence of holographic universe
A UK, Canadian and Italian study has provided what researchers believe is the first observational evidence that our universe could be a vast and complex hologram. Theoretical physicists and astrophysicists, investigating irregularities in the cosmic microwave background (the 'afterglow' of the Big Bang), have found there is substantial evidence supporting a holographic explanation of the universe -- in fact, as much as there is for the traditional explanation of these irregularities using the theory of cosmic inflation.
Publ.Date : Mon, 30 Jan 2017 08:32:31 EST

Cosmic lenses support finding on faster than expected expansion of the universe
By using galaxies as giant gravitational lenses, an international group of astronomers using the NASA/ESA Hubble Space Telescope have made an independent measurement of how fast the universe is expanding. The newly measured expansion rate for the local Universe is consistent with earlier findings. These are, however, in intriguing disagreement with measurements of the early universe. This hints at a fundamental problem at the very heart of our understanding of the cosmos.
Publ.Date : Thu, 26 Jan 2017 13:26:24 EST

Astronomers find seven dwarf-galaxy groups, the building blocks of massive galaxies
A team of astronomers has discovered seven distinct groups of dwarf galaxies with just the right starting conditions to eventually merge and form larger galaxies, including spiral galaxies like the Milky Way.
Publ.Date : Mon, 23 Jan 2017 13:36:39 EST

Can the donut-shaped magnet 'CAPPuccino submarine' hunt for dark matter?
Scientists have clarified that toroidal magnets can also look for axions, one of the particle candidates for the mysterious dark matter.
Publ.Date : Mon, 23 Jan 2017 09:06:33 EST

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