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Categories: Environmental: Wildfires, Space: Cosmology

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Space: Cosmology Space: Exploration Space: Structures and Features
Published

Searching for the earliest galaxies in the universe      (via sciencedaily.com) 

Astronomers have used data from NASA's James Webb Space Telescope (JWST) Early Release Observations and discovered 87 galaxies that could be the earliest known galaxies in the universe. The finding moves the astronomers one step closer to finding out when galaxies first appeared in the universe -- about 200-400 million years after the Big Bang.

Space: Cosmology Space: Exploration Space: Structures and Features
Published

NASA's Webb Telescope reveals links between galaxies near and far      (via sciencedaily.com) 

A new analysis of distant galaxies imaged by NASA's James Webb Space Telescope shows that they are extremely young and share some remarkable similarities to 'green peas,' a rare class of small galaxies in our cosmic backyard.

Space: Cosmology Space: Structures and Features
Published

James Webb telescope reveals Milky Way-like galaxies in young universe      (via sciencedaily.com) 

New images from NASA's James Webb Space Telescope (JWST) reveal galaxies with stellar bars -- elongated features of stars stretching from the centers of galaxies into their outer disks -- at a time when the universe was a mere 25% of its present age. The finding of so-called barred galaxies, similar to our Milky Way, this early in the universe will require astrophysicists to refine their theories of galaxy evolution.

Space: Cosmology Space: Structures and Features
Published

Hubble finds that ghost light among galaxies stretches far back in time      (via sciencedaily.com) 

In giant clusters of hundreds or thousands of galaxies, innumerable stars wander among the galaxies like lost souls, emitting a ghostly haze of light. These stars are not gravitationally tied to any one galaxy in a cluster. The nagging question for astronomers has been: how did the stars get so scattered throughout the cluster in the first place? Several competing theories include the possibility that the stars were stripped out of a cluster's galaxies, or they were tossed around after mergers of galaxies, or they were present early in a cluster's formative years many billions of years ago.

Ecology: General Environmental: Ecosystems Environmental: Wildfires
Published

Bird diversity increased in severely burned forests of Southern Appalachian mountains      (via sciencedaily.com) 

A new study found bird diversity increased in North Carolina mountain forest areas severely burned by wildfire in 2016, reinforcing that while wildfire can pose risks to safety and property, it can be beneficial to wildlife. The study results could help forest managers better predict bird responses to wildfire, and manage forests to benefit birds.

Environmental: Wildfires
Published

Wildfire threats not commonly disclosed by US firms despite risk to economy      (via sciencedaily.com) 

U.S. firms rarely report their wildfire risks in required federal filings and instead bury such risks in nonspecific risk disclosures, according to new research.

Space: Cosmology Space: Structures and Features
Published

Measuring gamma-ray bursts' hidden energy unearths clues to the evolution of the universe      (via sciencedaily.com) 

When stars die out, they emit gamma-ray bursts. Although scientist can calculate the explosion energy from dying stars, it is difficult to do when the conversion efficiency is low or unknown. Using light polarization, a research group has found a workaround for this, enabling astronomers to calculate the hidden energy of gamma-ray bursts.

Space: Cosmology Space: Exploration Space: Structures and Features
Published

Webb Space Telescope reveals previously shrouded newborn stars      (via sciencedaily.com) 

Astronomers took a 'deep dive' into one of the first images from NASA's James Webb Space Telescope and were rewarded with a surprising discovery: telltale signs of two dozen previously unseen young stars about 7,500 light years from Earth.

Space: Cosmology
Published

Light from outside our galaxy brighter than expected      (via sciencedaily.com) 

Scientists analyzed new measurements showing that the light emitted by stars outside our galaxy is two to three times brighter than the light from known populations of galaxies, challenging assumptions about the number and environment of stars are in the universe.

Space: Cosmology Space: The Solar System
Published

Exquisite views of distant galaxies      (via sciencedaily.com)     Original source 

For decades, the Hubble Space Telescope provided us with the most spectacular images of galaxies. This all changed when the James Webb Space Telescope (JWST) launched and successfully completed commissioning. For astronomers, the universe is now revealed in a new way never imagined by the telescope's Near-Infrared Camera (NIRCam) instrument.

Space: Cosmology Space: Structures and Features
Published

Machine learning reveals how black holes grow      (via sciencedaily.com) 

Black holes are surrounded by an invisible layer that swallows every bit of evidence about their past. Researchers are now using machine learning and supercomputers to reconstruct the growth histories of black holes.

Space: Cosmology Space: Structures and Features
Published

Discovering rare red spiral galaxy population from early universe with the James Webb Space Telescope      (via sciencedaily.com) 

Morphology of galaxies contain important information about the process of galaxy formation and evolution. With its state-of-the-art resolution, NASA's James Webb Space Telescope has now captured several red spiral galaxies in its first image at an unprecedented resolution. Researchers have now analyzed these galaxies, revealing that these are among the furthest known spiral galaxies till date. The analysis further detected a passive red spiral galaxy in the early universe, a surprising discovery.

Space: Cosmology Space: Structures and Features
Published

Without more data, a black hole's origins can be 'spun' in any direction      (via sciencedaily.com) 

A study finds that, for now, the catalog of known black hole binaries does not reveal anything fundamental about how black holes form. More data will be needed to determine whether the invisible giants arose from a quiet galactic disk or a more dynamic cluster of stars.

Computer Science: Quantum Computers Mathematics: Modeling Space: Cosmology
Published

Curved spacetime in the lab      (via sciencedaily.com) 

In a laboratory experiment, researchers have succeeded in realizing an effective spacetime that can be manipulated. In their research on ultracold quantum gases, they were able to simulate an entire family of curved universes to investigate different cosmological scenarios and compare them with the predictions of a quantum field theoretical model.

Space: Cosmology
Published

Astronomers report most distant known galaxies, detected and confirmed      (via sciencedaily.com) 

Astronomers have discovered the earliest and most distant galaxies confirmed to date using data from the James Webb Space Telescope. The telescope captured light emitted by these galaxies more than 13.4 billion years ago, which means the galaxies date back to less than 400 million years after the Big Bang, when the universe was only 2 percent of its current age.

Environmental: Ecosystems Environmental: Wildfires Paleontology: Climate
Published

Climate whiplash increased wildfires on California's west coast about 8,000 years ago      (via sciencedaily.com) 

Researchers have been studying the effects of the sudden decrease in global temperatures that occurred about 8,200 years ago, the so-called 8.2-kiloyear event, with the help of mineral deposits present in White Moon Cave in Northern California. New indications show that oscillations between extreme wetness and aridity in California were closely linked with the occurrence of wildfires. The researchers have concluded that such events are likely to become more common in the face of human-induced climate change.

Environmental: Wildfires
Published

Americans flocking to fire: National migration study      (via sciencedaily.com) 

Americans are leaving many of the U.S. counties hit hardest by hurricanes and heatwaves -- and moving towards dangerous wildfires and warmer temperatures, says one of the largest studies of U.S. migration and natural disasters. These results are concerning, as wildfire and rising temperatures are projected to worsen with climate change. The study was inspired by the increasing number of headlines of record-breaking natural disasters.

Space: Cosmology Space: Exploration Space: Structures and Features
Published

NASA missions probe game-changing cosmic explosion      (via sciencedaily.com) 

On Dec. 11, 2021, astronomers detected a blast of high-energy light from the outskirts of a galaxy around 1 billion light-years away. The event has rattled scientists' understanding of gamma-ray bursts (GRBs), the most powerful events in the universe.

Anthropology: Cultures Anthropology: General Archaeology: General Environmental: Ecosystems Environmental: Wildfires Paleontology: General
Published

For 400 years, Indigenous tribes buffered climate's impact on wildfires in the American Southwest      (via sciencedaily.com)     Original source 

Devastating megafires are becoming more common, in part, because the planet is warming. But a new study suggests bringing 'good fire' back to the U.S. and other wildfire fire-prone areas, as Native Americans once did, could potentially blunt the role of climate in triggering today's wildfires.

Offbeat: Paleontology and Archeology Space: Cosmology Space: Structures and Features Space: The Solar System
Published

Meteorites plus gamma rays could have given Earth the building blocks for life      (via sciencedaily.com) 

Even as detailed images of distant galaxies from the James Webb Space Telescope show us more of the greater universe, scientists still disagree about how life began here on Earth. One hypothesis is that meteorites delivered amino acids -- life's building blocks -- to our planet. Now, researchers have experimentally shown that amino acids could have formed in these early meteorites from reactions driven by gamma rays produced inside the space rocks.