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.

 

New measurement of Hubble constant adds to cosmic mystery
New measurements of the rate of expansion of the universe add to a growing mystery: Estimates of a fundamental constant made with different methods keep giving different results.
Publ.Date : Wed, 23 Oct 2019 15:03:27 EDT

How to spot a wormhole (if they exist)
Whether wormholes exist is up for debate. But in a recent article, physicists describe a technique for detecting these pathways.
Publ.Date : Wed, 23 Oct 2019 13:59:13 EDT

First identification of a heavy element born from neutron star collision
For the first time, a freshly made heavy element, strontium, has been detected in space, in the aftermath of a merger of two neutron stars. The detection confirms that the heavier elements in the Universe can form in neutron star mergers, providing a missing piece of the puzzle of chemical element formation.
Publ.Date : Wed, 23 Oct 2019 13:21:53 EDT

Monstrous galaxy from dawn of the universe accidentally discovered
The early universe is filled with monsters, a new study revealed. Researchers discovered a previously invisible galaxy, and perhaps a new galaxy population waiting to be discovered.
Publ.Date : Tue, 22 Oct 2019 14:22:02 EDT

A star is born: Using lasers to study how star stuff is made
On a typical day at the world's biggest laser you can find scientists casually making star-like conditions using 192 high-powered lasers. Stars in the universe are formed through a process called nucleosynthesis, which fuses lighter atoms to create new heavier atomic nuclei. Natural elements found here on Earth, such as helium and aluminum, were formed through this process inside of a star not unlike our own sun.
Publ.Date : Mon, 21 Oct 2019 08:28:21 EDT

Making connections: Bringing astrophysical processes down to Earth
Magnetic reconnection, a process in which magnetic field lines tear and come back together, releasing large amounts of kinetic energy, occurs throughout the universe. The process gives rise to auroras, solar flares and geomagnetic storms that can disrupt cell phone service and electric grids on Earth. A major challenge in the study of magnetic reconnection, however, is bridging the gap between these large-scale astrophysical scenarios and small-scale experiments that can be done in a lab.
Publ.Date : Mon, 21 Oct 2019 08:27:46 EDT

Ancient stars shed light on Earth's similarities to other planets
Earth-like planets may be common in the universe, a new study implies. The team of astrophysicists and geochemists presents new evidence that the Earth is not unique.
Publ.Date : Thu, 17 Oct 2019 14:10:52 EDT

New understanding of the evolution of cosmic electromagnetic fields
Electromagnetism was discovered 200 years ago, but the origin of the very large electromagnetic fields in the universe is still a mystery.
Publ.Date : Tue, 15 Oct 2019 13:14:34 EDT

Going against the flow around a supermassive black hole
At the center of a galaxy called NGC 1068, a supermassive black hole hides within a thick doughnut-shaped cloud of dust and gas. When astronomers used the Atacama Large Millimeter/submillimeter Array (ALMA) to study this cloud in more detail, they made an unexpected discovery that could explain why supermassive black holes grew so rapidly in the early Universe.
Publ.Date : Tue, 15 Oct 2019 13:14:28 EDT

Astronomers use giant galaxy cluster as X-ray magnifying lens
Astronomers have used a massive cluster of galaxies as an X-ray magnifying glass to peer back in time, to nearly 9.4 billion years ago. In the process, they spotted a tiny dwarf galaxy in its very first, high-energy stages of star formation.
Publ.Date : Mon, 14 Oct 2019 11:17:18 EDT

Black holes stunt growth of dwarf galaxies
Astronomers have discovered that powerful winds driven by supermassive black holes in the centers of dwarf galaxies have a significant impact on the evolution of these galaxies by suppressing star formation.
Publ.Date : Fri, 11 Oct 2019 16:53:22 EDT

Milky Way raids intergalactic 'bank accounts'
Gas blown out of the Milky Way disk from exploding stars falls back onto the galaxy to form new generations of stars. In an effort to account for this recycling process, astronomers were surprised to find a surplus of incoming gas.
Publ.Date : Thu, 10 Oct 2019 12:56:15 EDT

The Milky Way kidnapped several tiny galaxies from its neighbor
A team of astronomers has discovered that several of the small -- or 'dwarf' -- galaxies orbiting the Milky Way were likely stolen from the Large Magellanic Cloud, including several ultrafaint dwarfs, but also relatively bright and well-known satellite galaxies, such as Carina and Fornax.
Publ.Date : Thu, 10 Oct 2019 11:32:03 EDT

How do the strongest magnets in the universe form?
How do some neutron stars become the strongest magnets in the Universe? Astrophysicists have found a possible answer to the question of how these so-called magnetars form. Researchers have used large computer simulations to demonstrate how the merger of two stars creates strong magnetic fields. If such stars explode in supernovae, magnetars could result.
Publ.Date : Wed, 09 Oct 2019 13:17:44 EDT

2019 Nobel Prize in Physics: Evolution of the universe and discovery of exoplanet orbiting solar-type star
This year's Nobel Prize in Physics is being awarded "for contributions to our understanding of the evolution of the universe and Earth's place in the cosmos," with one half to James Peebles "for theoretical discoveries in physical cosmology" and the other half jointly to Michel Mayor and Didier Queloz "for the discovery of an exoplanet orbiting a solar-type star."
Publ.Date : Tue, 08 Oct 2019 08:55:31 EDT

Massive filaments fuel the growth of galaxies and supermassive black holes
Based on direct observations researchers have discovered massive filaments between galaxies in a proto-cluster, extending over more than 1 million parsecs and providing the fuel for intense formation of stars and the growth of super massive black holes within the proto-cluster.
Publ.Date : Thu, 03 Oct 2019 14:11:51 EDT

This is how a 'fuzzy' universe may have looked
Scientists have found that the early universe, and the very first galaxies, would have looked very different depending on the nature of dark matter. For the first time, the team has simulated what early galaxy formation would have looked like if dark matter were ''fuzzy,'' rather than cold or warm.
Publ.Date : Thu, 03 Oct 2019 13:03:19 EDT

The violent history of the big galaxy next door
Astronomers have pieced together the cannibalistic past of our neighboring large galaxy Andromeda, which has now set its sights on the Milky Way as its next main course.
Publ.Date : Wed, 02 Oct 2019 13:19:47 EDT

Quantum vacuum: Less than zero energy
According to quantum physics, energy can be 'borrowed' -- at least for some time. Energies lower than zero are possible, much like a bank account that can be overdrawn. There are, however, certain restrictions to that. Scientists have now shown that these restrictions are very fundamental properties of our universe and must be true for various possible quantum theories.
Publ.Date : Wed, 02 Oct 2019 10:27:50 EDT

Oldest galaxy protocluster forms 'queen's court'
Astronomers have discovered a collection of 12 galaxies which existed about 13.0 billion years ago. One of the 12 galaxies is a giant object, known as Himiko, which was named for a mythological queen in ancient Japan. This discovery suggests that large structures such as protoclusters already existed when the Universe was only about 800 million years old, 6% of its present age.
Publ.Date : Fri, 27 Sep 2019 07:49:41 EDT