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.

 

The core of massive dying galaxies already formed 1.5 billion years after the Big Bang
The most distant dying galaxy discovered so far, more massive than our Milky Way -- with more than a trillion stars -- has revealed that the 'cores' of these systems had formed already 1.5 billion years after the Big Bang, about 1 billion years earlier than previous measurements revealed. The discovery will add to our knowledge on the formation of the Universe more generally, and may cause the computer models astronomers use, one of the most fundamental tools, to be revised.
Publ.Date : Fri, 17 Jan 2020 10:47:50 EST

X-rays and gravitational waves will combine to illuminate massive black hole collisions
A new study has found that collisions of supermassive black holes may be simultaneously observable in both gravitational waves and X-rays at the beginning of the next decade.
Publ.Date : Tue, 14 Jan 2020 10:17:17 EST

Connecting the dots in the sky could shed new light on dark matter
Astrophysicists have come a step closer to understanding the origin of a faint glow of gamma rays covering the night sky. They found that this light is brighter in regions that contain a lot of matter and dimmer where matter is sparser -- a correlation that could help them narrow down the properties of exotic astrophysical objects and invisible dark matter.
Publ.Date : Mon, 13 Jan 2020 17:56:46 EST

Stars need a partner to spin universe's brightest explosions
When it comes to the biggest and brightest explosions seen in the universe, astronomers have found that it takes two stars to make a gamma-ray burst.
Publ.Date : Mon, 13 Jan 2020 10:42:01 EST

Experiment on beta-decay sheds light on fate of intermediate-mass stars
A group of scientists succeeded to experimentally determine characteristics of nuclear processes in matter ten million times denser and 25 times hotter than the center of our sun. A result of the measurement is that intermediate-mass stars are very likely to explode, and not, as assumed until now, collapse.
Publ.Date : Fri, 10 Jan 2020 10:10:20 EST

Cosmic bubbles reveal the first stars
Astronomers have identified several overlapping bubbles of hydrogen gas ionized by the stars in early galaxies, a mere 680 million years after the Big Bang. This is the earliest direct evidence from the period when the first generation of stars formed and began reionizing the hydrogen gas that permeated the Universe.
Publ.Date : Wed, 08 Jan 2020 07:48:05 EST

Astronomers spot distant galaxy group driving ancient cosmic makeover
Astronomers have found the farthest galaxy group identified to date. Called EGS77, the trio of galaxies dates to a time when the universe was only 680 million years old, or less than 5% of its current age of 13.8 billion years.
Publ.Date : Mon, 06 Jan 2020 14:16:10 EST

Astronomers find wandering massive black holes in dwarf galaxies
Studies with the VLA indicate that roughly half of the massive black holes in dwarf galaxies are not in the centers of those galaxies. This gives astronomers new insights into the conditions in which similar black holes formed and grew in the early history of the universe.
Publ.Date : Mon, 06 Jan 2020 10:34:40 EST

The 'cores' of massive galaxies had already formed 1.5 billion years after the Big Bang
A distant galaxy more massive than our Milky Way -- with more than a trillion stars - has revealed that the 'cores' of massive galaxies in the Universe had already formed 1.5 billion years after the Big Bang, about 1 billion years earlier than previous measurements revealed.
Publ.Date : Thu, 19 Dec 2019 10:17:36 EST

ESO observations reveal black holes' breakfast at the cosmic dawn
Astronomers have observed reservoirs of cool gas around some of the earliest galaxies in the universe. These gas halos are the perfect food for supermassive black holes at the center of these galaxies, which are now seen as they were over 12.5 billion years ago. This food storage might explain how these cosmic monsters grew so fast during a period in the universe's history known as the Cosmic Dawn.
Publ.Date : Thu, 19 Dec 2019 07:46:32 EST

Distant Milky Way-like galaxies reveal star formation history of the universe
Thousands of galaxies are visible in a new radio image of an area in the Southern Sky, made with the MeerKAT telescope. The numerous faint dots are distant galaxies like our own Milky Way, that have never been observed in radio light before.
Publ.Date : Tue, 17 Dec 2019 12:39:48 EST

Carbon cocoons surround growing galaxies
Researchers have discovered gigantic clouds of gaseous carbon spanning more than a radius of 30,000 light-years around young galaxies using the Atacama Large Millimeter/submillimeter Array (ALMA). This is the first confirmation that carbon atoms produced inside of stars in the early Universe have spread beyond galaxies. No theoretical studies have predicted such huge carbon cocoons around growing galaxies, which raises questions about our current understanding of cosmic evolution.
Publ.Date : Mon, 16 Dec 2019 11:01:23 EST

Planet-mass objects in extragalactic systems
A research group is reporting the detection of extragalactic planet-mass objects in a second and third galaxy beyond the Milky Way after the first detection in 2018. With the existing observational resources, it is impossible to directly detect planet-mass objects beyond the Milky Way and to measure its rogue planetary population.
Publ.Date : Thu, 12 Dec 2019 09:59:04 EST

ALMA spots most distant dusty galaxy hidden in plain sight
Astronomers have spotted the light of a massive galaxy seen only 970 million years after the Big Bang. This galaxy, called MAMBO-9, is the most distant dusty star-forming galaxy that has ever been observed without the help of a gravitational lens.
Publ.Date : Wed, 11 Dec 2019 12:19:01 EST

Water common -- yet scarce -- in exoplanets
The most extensive survey of atmospheric chemical compositions of exoplanets to date has revealed trends that challenge current theories of planet formation and has implications for the search for water in the solar system and beyond.
Publ.Date : Wed, 11 Dec 2019 08:26:56 EST

A new theory for how black holes and neutron stars shine bright
Astrophysicists employed massive super-computer simulations to calculate the mechanisms that accelerate charged particles in extreme environments. They concluded their energization is powered by the interplay of chaotic motion and reconnection of super-strong magnetic fields.
Publ.Date : Wed, 27 Nov 2019 16:12:55 EST

Scientists inch closer than ever to signal from cosmic dawn
Researchers have taken a new and significant step toward detecting a signal from the period in cosmic history when the first stars lit up the universe.
Publ.Date : Tue, 26 Nov 2019 12:11:34 EST

The simultaneous merging of giant galaxies
Scientists proved for the first time that the galaxy NGC 6240 contains three supermassive black holes. The unique observations show the black holes close to each other in the core of the galaxy. The study points to simultaneous merging processes during the formation of the largest galaxies in the universe.
Publ.Date : Thu, 21 Nov 2019 12:17:26 EST

Spin doctors: Astrophysicists find when galaxies rotate, size matters
The direction in which a galaxy spins depends on its mass, researchers have found.
Publ.Date : Fri, 15 Nov 2019 10:10:58 EST

Ancient gas cloud reveals universe's first stars formed quickly
The discovery of a 13 billion-year-old cosmic cloud of gas enabled a team of astronomers to perform the earliest-ever measurement of how the universe was enriched with a diversity of chemical elements. Their findings reveal that the first generation of stars formed more quickly than previously thought.
Publ.Date : Fri, 08 Nov 2019 15:54:44 EST