Science & Technology
Astronomers spot galaxy shaped like the Milky Way but is far more massive
Astronomers have observed a galaxy dating to an earlier epoch in the universe’s history that surprisingly is shaped much like our Milky Way – a spiral structure with a straight bar of stars and gas running through its center – but far more massive, offering new insight into galactic formation.
The distant galaxy, called J0107a, was observed as it appeared 11.1 billion years ago, when the universe was about a fifth of its current age. The researchers used data from the Chile-based Atacama Large Millimeter/submillimeter Array (ALMA) and NASA’s James Webb Space Telescope to study the galaxy, Reuters reported.
They determined that the galaxy’s mass, including its stars and gas, was more than 10 times greater than that of the Milky Way, and it was forming stars at an annual rate approximately 300 times greater. J0107a was more compact than the Milky Way, however.
“The galaxy is a monster galaxy with a high star formation rate and plenty of gas, much more than present-day galaxies,” said astronomer Shuo Huang of the National Astronomical Observatory of Japan, lead author of the study published this week in the journal Nature, opens new tab.
“This discovery,” said study co-author Toshiki Saito, an astronomer at Shizuoka University in Japan, “raises the important question: How did such a massive galaxy form in such an early universe?”
While a few galaxies that are undergoing star formation at a similar rate to J0107a exist in today’s universe, almost all of them are ones that are in the process of a galactic merger or collision. There was no sign of such circumstances involving this galaxy.
J0107a and the Milky Way have some commonalities.
“They are similarly huge and possess a similar barred structure. However, the Milky Way had plenty of time to form its huge structures, while J0107a didn’t,” Saito said.
In the first few billion years after the Big Bang event 13.8 billion years ago that initiated the universe, galaxies were turbulent entities and were much richer in gas than those existing currently – factors that fostered extreme bursts of star formation. While galaxies with highly organized structures like the barred spiral shape of the Milky Way are common now, that was not the case 11.1 billion years ago.
“Compared to other monster galaxies in the distant universe (dating to an earlier cosmic epoch) whose shapes are usually disturbed or irregular, it is unexpected that J0107a looks very similar to present-day spiral galaxies,” Huang said.
“Theories about the formation of present-day galactic structures may need to be revised,” Huang added.
The Webb telescope, as it peers across vast distances back to the early universe, has found that galaxies with a spiral shape appeared much earlier than previously known. J0107a is now one of the earliest-known examples of a barred spiral galaxy.
About two thirds of spiral galaxies observed in the universe today possess a bar structure. The bar is thought to serve as a form of stellar nursery, bringing gas inward from the galaxy’s spiral arms. Some of the gas forms what are called molecular clouds. Gravity causes the contraction of these clouds, with small centers taking shape that heat up and become new stars.
The bar that is part of J0107a measures about 50,000 light years in length, Huang said. A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km).
The Webb telescope “has been studying the morphology of early massive galaxies intensely recently. However, their dynamics are still poorly understood,” Saito said.
Science & Technology
Ethiopian volcano erupts for first time in nearly 12,000 years
Ash from the eruption drifted across the region, spreading over Yemen, Oman, India, and parts of Pakistan.
The Hayli Gubbi volcano in Ethiopia’s Afar region has erupted for the first time in almost 12,000 years, sending massive ash plumes soaring up to 14 kilometres into the atmosphere, according to the Toulouse Volcanic Ash Advisory Centre.
The eruption began on Sunday and lasted several hours. Hayli Gubbi, located around 800 kilometres northeast of Addis Ababa near the Eritrean border, sits within the geologically active Rift Valley, where two major tectonic plates meet. The volcano rises roughly 500 metres above the surrounding landscape.
Ash from the eruption drifted across the region, spreading over Yemen, Oman, India, and parts of Pakistan. Satellite imagery and social-media videos captured a towering column of white smoke billowing into the sky.
The Smithsonian Institution’s Global Volcanism Program notes that Hayli Gubbi has no recorded eruptions during the Holocene, the period dating back about 12,000 years to the end of the last Ice Age.
Volcanologist Simon Carn of Michigan Technological University also confirmed on Bluesky that the volcano had “no record of Holocene eruptions.”
Science & Technology
Cloudflare outage easing after millions of internet users affected
A global outage at web-infrastructure firm Cloudflare began to ease on Tuesday afternoon after preventing people from accessing major internet platforms, including X and ChatGPT.
Cloudflare, whose network handles around a fifth of web traffic, said it started to investigate the internal service degradation around 6:40 a.m. ET. It has deployed a fix but some customers might still be impacted as it recovers service.
The incident marked the latest hit to major online services. An outage of Amazon’s cloud service last month caused global turmoil as thousands of popular websites and apps, including Snapchat, were inaccessible due to the disruption.
Cloudflare – whose shares were down about 5% in premarket trading – runs one of the world’s largest networks that helps websites and apps load faster and stay online by protecting them from traffic surges and cyberattacks.
The latest outage prevented users from accessing platforms such as Canva, X, and ChatGPT, prompting users to log outage reports with Downdetector.
Downdetector tracks outages by collating status reports from a number of sources. “We saw a spike in unusual traffic to one of Cloudflare’s services beginning at 11:20 UTC. That caused some traffic passing through Cloudflare’s network to experience errors,” the company said in an emailed statement.
“We are all hands on deck to make sure all traffic is served without errors.”
X and ChatGPT-creator OpenAI did not immediately respond to requests for comment. – REUTERS
Science & Technology
China sends its youngest astronaut to ‘Heavenly Palace’ space station
China’s Shenzhou-21 space rocket and its crew including the youngest member of its astronaut corps blasted off on Friday atop a Long March-2F rocket from the Jiuquan Satellite Launch Centre in northwest China, Chinese state media reported.
It was the seventh mission to the permanently inhabited Chinese space station since it was completed in 2022, Reuters reported.
Missions on China’s Shenzhou-21 spacecraft involve trios of astronauts on six-month stays in space, with veteran astronauts increasingly replaced by younger faces. First-timers Zhang Hongzhang, 39, and Wu Fei, 32 – China’s youngest astronaut to be sent to space – were picked to participate in the programme in 2020.
Commander Zhang Lu, 48, flew on the 2022 Shenzhou-15 mission.
FIRST SMALL MAMMALS ON SPACE STATION
The Shenzhou-21 astronauts will take over from the Shenzhou-20 crew who had lived and worked on board Tiangong, or “Heavenly Palace”, for more than six months. The Shenzhou-20 astronauts will return to Earth in the coming days.
The Shenzhou-21 crew were also joined by four black mice, the first small mammals to be taken to the Chinese space station. The mice will be used in experiments on reproduction in low Earth orbit.
Biannual launches have become the norm for the Shenzhou programme, which has in the past year reached new milestones with the deployment of Chinese astronauts born in the 1990s, a world-record spacewalk, and plans to train and send the first foreign astronaut, from Pakistan, to Tiangong next year.
The rapid advances have raised alarm bells in Washington, which is now racing to put a U.S. astronaut on the moon again before China does.
Both countries are also competing in nascent institution-building efforts, with the U.S.-led Artemis Accords on lunar exploration matched up against the Chinese and Russian-led International Lunar Research Station.
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