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Cosmic History

All articles tagged with #cosmic history

Record-Breaking Radio Burst Detected from Galaxy Formed in Early Universe
science5 days ago

Record-Breaking Radio Burst Detected from Galaxy Formed in Early Universe

Astronomers have identified the most distant fast radio burst (FRB) ever recorded, originating from a galaxy that existed when the universe was only 3 billion years old. Detected via the MeerKAT telescope in South Africa and confirmed by the James Webb Space Telescope, this burst traveled for over 10 billion years, covering approximately 80% of cosmic history. The source is a young, metal-poor galaxy with rapid star formation, challenging existing theories about FRB origins. This discovery suggests FRBs were common in the early universe and provides a new method for mapping unseen matter across vast cosmic distances.

via The Guardian|
#astronomy#cosmic-history#fast-radio-bursts
Understanding the Universe's First Stars
science1 year ago

Understanding the Universe's First Stars

The article explains that the 'first stars' in the universe, known as Population III stars, formed from pristine hydrogen and helium shortly after the Big Bang, around 50-100 million years later, and were much larger and shorter-lived than stars today. Despite advanced telescopes like JWST, these first stars have not yet been observed directly, but their formation is predicted by simulations based on cosmic evolution models.

via Big Think|
#big-bang#cosmic-history#first-stars
New Telescope to Discover the Universe's First Stars
science1 year ago

New Telescope to Discover the Universe's First Stars

The James Webb Space Telescope has advanced our understanding of distant galaxies but is unlikely to detect the very first stars due to cosmic extinction. Future telescopes focusing on longer wavelengths, such as far-infrared or radio observations from the Moon's far side, hold promise for uncovering the universe's earliest stellar populations, potentially revealing the first stars formed after the Big Bang.

via Big Think|
#cosmic-history#first-stars#infrared-astronomy
"James Webb Telescope Discovers Most Distant and Earliest Known Galaxy"
space-and-physics2 years ago

"James Webb Telescope Discovers Most Distant and Earliest Known Galaxy"

An international team of astronomers using the James Webb Space Telescope (JWST) has discovered two of the earliest and most distant galaxies, dating back to just 300 million years after the Big Bang. These galaxies, located near the Hubble Ultra Deep Field, were observed through JWST's advanced infrared capabilities, revealing significant star formation and chemical elements. The findings, part of the JWST Advanced Deep Extragalactic Survey (JADES), suggest that even more ancient galaxies could soon be discovered. The research papers are currently awaiting peer review.

via IFLScience|
#big-bang#cosmic-history#distant-galaxies
James Webb Telescope Discovers Most Distant Galaxy Ever
science-and-technology2 years ago

James Webb Telescope Discovers Most Distant Galaxy Ever

The James Webb Space Telescope (JWST) has discovered the most distant galaxy ever found, JADES-GS-z14-0, which dates back to just 285 million years after the Big Bang. This discovery has provided five key insights: not all early galaxies are compact, some ultra-distant galaxy candidates are incorrect, some galaxies are hidden by closer interlopers, the new record-holder is unexpectedly bright, and it is extremely dust-poor. These findings continue to enhance our understanding of the early Universe.

via Big Think|
#astronomy#cosmic-history#galaxies
Euclid Telescope Unveils New Cosmic and Dark Universe Images
science2 years ago

Euclid Telescope Unveils New Cosmic and Dark Universe Images

The first data from the Euclid telescope, part of the Dark Energy Satellite Mission, has been released, revealing new insights into the universe's distant past. The data includes images of the Perseus cluster, free-floating planets, new dwarf galaxies, and very distant bright galaxies. The findings highlight Euclid's potential to revolutionize our understanding of dark energy and galaxy formation.

via Phys.org|
#cosmic-history#dark-energy#euclid-telescope
"Unveiling Shiva and Shakti: Ancient Star Streams that Shaped the Milky Way"
astronomy2 years ago

"Unveiling Shiva and Shakti: Ancient Star Streams that Shaped the Milky Way"

Astronomers using the Gaia space telescope have discovered two ancient streams of stars, named Shakti and Shiva, which are remnants of galaxies that merged with an early version of the Milky Way over 12 billion years ago. These streams provide insights into the galaxy's earliest days and its evolution, shedding light on how the Milky Way grew in size by merging with other galaxies. The unprecedented data from Gaia has enabled the detection of these ancient structures, contributing to a fuller understanding of the Milky Way's cosmic history.

via CNN|
#ancient-star-streams#astronomy#cosmic-history
"Universe-Breaking Events: Changing Perspectives on Its Origins"
space-science2 years ago

"Universe-Breaking Events: Changing Perspectives on Its Origins"

The James Webb Space Telescope has revealed images of black holes and ultramassive galaxies, with Dr. Caitlin Casey set to lead a lecture at the University of Texas on the telescope's discoveries, including mature galaxies and large black holes within the first billion years of cosmic history. The lecture will showcase recent findings and new Deep Field images from JWST, containing a million galaxies, offering a glimpse into the universe's early days.

via KXAN.com|
#astronomy#cosmic-history#james-webb-space-telescope