Latest news with #GhassemGozaliasl
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.
