Latest news with #GhassemGozaliasl
Time of India
14-06-2025
- Science
- Time of India
NASA's James Webb Telescope captures thousands of galaxies in one picture
In an awe-inspiring moment for space exploration, NASA's James Webb Space Telescope (JWST) has snapped a breathtaking photo featuring thousands of galaxies in one picture. The incredible landscape is a part of the COSMOS-Webb survey . It is one of the biggest surveys ever carried out by the telescope. The picture is a profound and dimensional window into the universe that extends for billions of years. It contains everything from star systems close by to distant galaxies created only a short time after the Big Bang. Every element contributes to how the universe has developed. As a result of Webb's strong infrared capabilities, scientists can now observe structures and galaxies that were out of sight before. This new information is assisting researchers to investigate how galaxies evolve, develop, and engage across the long expanse of cosmic history. James Webb Telescope's image snaps far-away galaxies, stars at different distances The image showcases a massive field of galaxies located at varying distances, offering astronomers a chance to peer into the past. Since light from distant objects takes billions of years to reach us, looking at far-off galaxies is like looking back in time. Some of the galaxies in this frame existed not long after the Big Bang, providing rare insight into how the universe looked during its earliest stages. What is COSMOS-Web mission by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like If You Need To Kill Time On Your Computer, This Popular Strategy Game Is A Must Forge Of Empires Undo This is an image from the COSMOS-Web project, the Webb mission's largest near-infrared survey. It is led by Dr. Ghassem Gozaliasl of the University of Helsinki and maps 0.54 square degrees of the sky—over twice the size of three full moons. It is designed to investigate galaxy formation , star formation, and dark matter structures over billions of light-years. It occupies more than 250 hours of telescope time and returns data that will be kindling for scientific investigation for years to come. James Webb Space Telescope unveils hidden universe Unlike earlier observatories, JWST employs infrared detectors to see through cosmic dust and capture the faint light of distant galaxies. While Hubble and Chandra have offered visible and X-ray information, Webb sees further—uncovering faint, red-shifted galaxies too far away to be seen previously. These galaxies, many of which are little more than spots in the picture, are some of the universe's earliest to have formed. Galaxy clusters: Cosmic cities in motion One of the more striking aspects of the image is a glittering gold-hued cluster at the center, symbolising a tight packing of galaxies. The clusters play a key role in understanding galaxy evolution. More than half of all galaxies live in groups or clusters, where gravity interacts in a dramatic way—initiating mergers, gas stripping, and occasionally creating new stars. What happens when galaxies collide Within galaxy clusters, the interactions are fierce. Gravity can distort galactic forms, trigger collisions, or even suppress star formation. Ram pressure stripping is a process that strips galaxies traveling through a thick cluster of gas, typically resulting in their aging and evolution. Such dynamic conditions define the destiny of every galaxy and make the cosmic web the elaborate structure it is. Image colour can tell the age of galaxies By viewing colors in Webb's image, researchers can make guesses about galaxy age and rates of activity. Younger stars shine with blue light, whereas older stars glow red. Faraway galaxies appear red due to redshift—the cosmic expansion, which stretches light waves. This color coding assists researchers in charting star formation rates and gaining insight into galaxy life cycles. Pushing the frontiers of discovery The Webb Telescope's sensitivity to faint infrared light is already sparking new theories of galaxy evolution. Scientists are particularly interested in galaxies from the reionisation epoch, when the first stars reionised hydrogen gas in the universe. Mapping how star mass is tied to halo mass, scientists hope to reveal secrets about stability, structure, and future star formation. This one picture is more than just a snapshot—it's a rich data set full of history and discovery. The combination of data from Webb, Hubble, Chandra, and more enables astronomers to build detailed timelines of the evolution of the universe. With further analysis, this deep-space image will aid in solving some of astronomy's greatest questions regarding matter, energy, and the destiny of galaxies.
Economic Times
22-05-2025
- Science
- Economic Times
Astronomers observe largest ever sample of galaxies up to over 12 billion light years away: Study
The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space Telescope (JWST) in an area of the sky called COSMOS Web. The study marks a major milestone in extragalactic astronomy, providing unprecedented insights into the formation and evolution of galaxies and the large-scale structure of the universe. Peering back in time to when the universe was younger than the Earth is now, the images span the period from around twelve billion years ago until one billion years new catalogue of images, soon to be published in the journal Astronomy and Astrophysics (A&A), includes nearly 1,700 galaxy research group's impressive image of a galaxy cluster over six billion light years away is currently showcased as the European Space Agency's (ESA) picture of the month. "We're able to actually observe some of the first galaxies formed in the universe," says Ghassem Gozaliasl of Aalto University, and head of the galaxy groups detection team who led the study."We detected 1,678 galaxy groups or proto-clusters -- the largest and deepest sample of galaxy groups ever detected -- with the James Webb Space Telescope. With this sample, we can study the evolution of galaxies in groups over the past 12 billion years of cosmic time," added Gozaliasl. The James Webb Space Telescope began operating in 2022. The largest telescope in space, with its higher resolution and greater sensitivity, has enabled astronomers to see farther and better than ever before. Because light travels at a finite speed, the further away an object is, the further back in time our image of it. By observing very faint, very distant galaxies -- the faintest galaxies in this dataset are one billion times dimmer than the human eye can see -- the team got a glimpse of what galaxies looked like in the early universe, Gozaliasl said. Gozaliasl explains that galaxy groups and clusters are rich environments filled with dark matter, hot gas, and massive central galaxies that often host supermassive black holes. "The complex interactions between these components play a crucial role in shaping the life cycles of galaxies and driving the evolution of the groups and clusters themselves. By uncovering a more complete history of these cosmic structures, we can better understand how these processes have influenced the formation and growth of both massive galaxies and the largest structures in the universe," added Gozaliasl.
NDTV
22-05-2025
- Science
- NDTV
Largest Sample Of Galaxies Up To Over 12 Billion Light Years Away Observed
Helsinki: The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space Telescope (JWST) in an area of the sky called COSMOS Web. The study marks a major milestone in extragalactic astronomy, providing unprecedented insights into the formation and evolution of galaxies and the large-scale structure of the universe. Peering back in time to when the universe was younger than the Earth is now, the images span the period from around twelve billion years ago until one billion years ago. The new catalogue of images, soon to be published in the journal Astronomy and Astrophysics (A&A), includes nearly 1,700 galaxy groups. The research group's impressive image of a galaxy cluster over six billion light years away is currently showcased as the European Space Agency's (ESA) picture of the month. "We're able to actually observe some of the first galaxies formed in the universe," says Ghassem Gozaliasl of Aalto University, and head of the galaxy groups detection team who led the study. "We detected 1,678 galaxy groups or proto-clusters -- the largest and deepest sample of galaxy groups ever detected -- with the James Webb Space Telescope. With this sample, we can study the evolution of galaxies in groups over the past 12 billion years of cosmic time," added Gozaliasl. The James Webb Space Telescope began operating in 2022. The largest telescope in space, with its higher resolution and greater sensitivity, has enabled astronomers to see farther and better than ever before. Because light travels at a finite speed, the further away an object is, the further back in time our image of it. By observing very faint, very distant galaxies -- the faintest galaxies in this dataset are one billion times dimmer than the human eye can see -- the team got a glimpse of what galaxies looked like in the early universe, Gozaliasl said. Gozaliasl explains that galaxy groups and clusters are rich environments filled with dark matter, hot gas, and massive central galaxies that often host supermassive black holes. "The complex interactions between these components play a crucial role in shaping the life cycles of galaxies and driving the evolution of the groups and clusters themselves. By uncovering a more complete history of these cosmic structures, we can better understand how these processes have influenced the formation and growth of both massive galaxies and the largest structures in the universe," added Gozaliasl.
Time of India
22-05-2025
- Science
- Time of India
Astronomers observe largest ever sample of galaxies up to over 12 billion light years away: Study
An international team of astronomers, utilizing the James Webb Space Telescope, has identified nearly 1,700 galaxy groups in the COSMOS Web area. This extensive catalogue provides unprecedented insights into galaxy formation and the universe's large-scale structure, spanning from twelve billion to one billion years ago. The findings allow scientists to study galaxy evolution within groups across vast cosmic time. Tired of too many ads? Remove Ads Tired of too many ads? Remove Ads The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space Telescope (JWST) in an area of the sky called COSMOS study marks a major milestone in extragalactic astronomy , providing unprecedented insights into the formation and evolution of galaxies and the large-scale structure of the back in time to when the universe was younger than the Earth is now, the images span the period from around twelve billion years ago until one billion years new catalogue of images, soon to be published in the journal Astronomy and Astrophysics (A&A), includes nearly 1,700 galaxy research group's impressive image of a galaxy cluster over six billion light years away is currently showcased as the European Space Agency's (ESA) picture of the month."We're able to actually observe some of the first galaxies formed in the universe," says Ghassem Gozaliasl of Aalto University, and head of the galaxy groups detection team who led the study."We detected 1,678 galaxy groups or proto-clusters -- the largest and deepest sample of galaxy groups ever detected -- with the James Webb Space Telescope. With this sample, we can study the evolution of galaxies in groups over the past 12 billion years of cosmic time," added James Webb Space Telescope began operating in 2022. The largest telescope in space, with its higher resolution and greater sensitivity, has enabled astronomers to see farther and better than ever light travels at a finite speed, the further away an object is, the further back in time our image of it. By observing very faint, very distant galaxies -- the faintest galaxies in this dataset are one billion times dimmer than the human eye can see -- the team got a glimpse of what galaxies looked like in the early universe, Gozaliasl explains that galaxy groups and clusters are rich environments filled with dark matter , hot gas, and massive central galaxies that often host supermassive black holes."The complex interactions between these components play a crucial role in shaping the life cycles of galaxies and driving the evolution of the groups and clusters themselves. By uncovering a more complete history of these cosmic structures, we can better understand how these processes have influenced the formation and growth of both massive galaxies and the largest structures in the universe," added Gozaliasl.
Yahoo
04-05-2025
- Science
- Yahoo
Space photo of the week: Record-breaking James Webb telescope image captures 1,678 galaxy groups at once
When you buy through links on our articles, Future and its syndication partners may earn a commission. What it is: Thousands of galaxy groups from the early universe Where it is: 12 billion light-years away in the constellation Sextans When it was shared: April 29, 2025 Why it's so special: Sitting across a part of the night sky that looks away from the Milky Way and into the distant universe, the constellation Leo, the lion, is known to astronomers as the realm of the galaxies. But when the James Webb Space Telescope (JWST) peered next to the lion, it revealed astounding new details. In the tiny constellation Sextans, JWST detected groups of galaxies up to 12 billion light-years away. The universe is 13.8 billion years old, so these galaxies date back to the universe's early years. Just as gravity causes moons to orbit planets, planets to orbit stars and stars to orbit the centers of their galaxies, galaxies themselves orbit each other to create gravitationally bound groups, according to NASA. This largest-ever sample of 1,678 galaxy groups is helping astronomers figure out what the early universe was like and how it has changed over the past 12 billion years. Related: Scientists spot a 'dark nebula' being torn apart by rowdy infant stars — offering clues about our own solar system's past Galaxies that existed in the early universe had irregular shapes and formed lots of stars, while galaxies that formed later appear more symmetrical and structured, with elliptical and spiral galaxies — like our Milky Way. "Like humans, galaxies come together and make families,' Ghassem Gozaliasl, a researcher in astronomy at Aalto University, head of the galaxy groups detection team and lead author of a study on the findings accepted for publication in the journal Astronomy and Astrophysics, said in a statement. "Groups and clusters are really important because within them galaxies can interact and merge together, resulting in the transformation of galaxy structure and morphology.' In these galaxies, astronomers can also study dark matter, supermassive black holes and the gas between galaxies. RELATED STORIES —Space photo of the week: Iconic 'Eagle Nebula' gets a major glow-up on Hubble's 35th anniversary —James Webb telescope reveals truth about 'impossible' black hole thought to be feeding at 40 times the theoretical limit —42 jaw-dropping James Webb Space Telescope images NASA has a long history of turning its space telescopes to face the universe at large to take "deep field" images. The first was the Hubble Deep Field in 1995, which included about 3,000 distant galaxies. According to NASA, the installation of a new camera in 2002 enabled the even more impressive Hubble Ultra Deep Field in 2004, which revealed almost 10,000 galaxies, some existing when the universe was just 800 million years old. That was followed by the Hubble eXtreme Deep Field, which uncovered 5,500 galaxies up to 13.2 billion light-years away. However, it didn't take long after its launch for JWST to better its optical forerunner, in 2022 delivering its first deep field of galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago — one of the deepest, sharpest infrared images of the distant universe to date. JWST followed that up with a deep-field image of Pandora's Cluster in February 2023. For more sublime space images, check out our Space Photo of the Week archives.
