Connect with us

Tech

What a dying star looks like – James Webb Telescope tells us

Published

on

What a dying star looks like - James Webb Telescope tells us

 Glorious photos of a fading star SN1987A which turned supernova in 1987 – the closest and brightest star explosion seen from Earth – were released on Thursday. 

In the capture it emerges that dying star appears to be a necklace surrounded by emitted material of gas, and dust including two pearls earlier not detected by the European Hubble Space Telescope.

The new revelation — at a distance of 170,000 light-years — has allowed astronomers to dive deep into the life cycles of stars and the pattern of their death. This supernova in the Southern hemisphere of the sky is the most observed celestial object in space.

The image shows a series of luminous rings that represent bands of gas and dust pushed out by SN1987A in its various stages of death since it was excited and illuminated by the expanding shockwaves emanating in the last moment of the collapse and going supernova.

Advertisement

According to the scientists, one of these rings is a string of pearls, which comprises material ejected about 20,000 years before the final occurrence.

It became possible through the James Webb Space Telescope which provided a clear view till date of the necklace and the diffusing brightness surrounding the star.

“We’re able to see new hotspots emerging outside the ring that has previously been illuminated,” Dr Roger Wesson from Cardiff University, UK told BBC News.

“In addition, we see emission from molecular hydrogen in the ring that was not necessarily expected and something only JWST could have revealed with its superior sensitivity and resolution,” he added.

New features that came to the fore by James Webb are the crescents or arcs of emission inside the cosmic jewellery necklace but just outside the dense inner area that looks a little like a keyhole.

Advertisement

“We don’t really understand the crescents yet,” lead analyst Dr Mikako Matsuura said, adding that “this material could be being illuminated by some kind of reverse shock — a shock coming back towards the keyhole.”

Despite its potency, JWST cannot see the remnants of the dying star that are buried somewhere in the dense dust field. Those remnants should be compact objects made up of neutron particles and measuring just a few tens of kilometres across.

Since the star went supernova, every large telescope that can see SN1987A has observed and studied its evolution and other features.

While tracing the causes, astronomers believe that the star was hot, relatively young, probably 20 to 30 times as massive as our Sun.

Dr Wesson said: “One of the mysteries of this star is that it exploded when it was a blue supergiant when at the time all the theories said only red supergiant stars could explode. So unravelling that mystery has been one of the great quests.”

Advertisement

“The indications are that Webb will be operational much longer than originally envisaged — maybe 20 years — and that will give us a very powerful tool to keep on monitoring SN1987A to see how it is changing.”
 

Tech

Musk pushes plan for China data to power Tesla’s AI ambitions

Musk pushes plan for China data to power Tesla’s AI ambitions

Published

on

By

Musk pushes plan for China data to power Tesla's AI ambitions

Tesla is pushing ahead with plans to power the global development of its self-driving system with data from China that could be processed within the country, part of a strategic shift by Elon Musk, according to people with knowledge of the work.

As part of that effort, Tesla has been developing plans for a data center in China to train the algorithm needed for more fully autonomous vehicles, according to two people, who asked not to be named because the work remains private. 

Until recently, Tesla has focused on efforts to secure approval from Chinese regulators to transfer data generated by its EVs in China out of the country for its “Full Self Driving” (FSD) system, according to the two people and an additional person with knowledge of the matter.

It was not clear if Tesla would proceed with both options for handling self-driving data from China – data transfer and a local data center – or if it was developing parallel plans as a hedge.

Advertisement

Tesla’s efforts underscore the speed of the electric vehicle maker’s pivot to bet on a breakthrough in AI at a time when EV demand has slowed and its competition has deepened.

Its push to make fuller use of data from vehicles in China to develop the automaker’s artificial intelligence for driving comes as the U.S. government has tried to clamp down on the transfer of AI technology from U.S. firms to China.

Tesla has not been able to offer the full version of FSD, which costs the equivalent of almost $9,000, in China.

A wider market for FSD in China would give a boost to the automaker’s revenue and profits at a time when both are getting squeezed by pressure from Chinese rivals such as BYD.

Setting up a data center in China for FSD development would require Tesla to work with a Chinese partner, two of the sources said. There is also a potential hardware-sourcing challenge.

Advertisement

It has had talks with Nvidia about acquiring graphic processing units for a China data center, according to one of the people, who was briefed on the discussions. U.S. sanctions bar Nvidia and its partners from selling its most advanced chips in China.

Tesla’s campaign to make more use of data from China was kicked into high gear in a whirlwind trip by Musk to Beijing last month when he met with officials including Premier Li Qiang.

In his meeting with Li, Musk sought to smooth permissions for Tesla’s data transfer, two of the sources said. The potential of Tesla investing in a data center in China was also raised, they said.

Musk also discussed the possibility of Tesla licensing its FSD systems to Chinese EV makers, one person said. Musk had said in April Tesla was talking to another “major” automaker about licensing FSD without naming it.

China’s State Council Information Office did not respond to a request for comment.

THE CHINA EFFECT

Advertisement

China, the world’s largest car market, has the biggest fleet of sensor-equipped cars capable of collecting data from congested cities with complicated traffic patterns, making data generated there valuable for automakers and AI providers.

Musk previously expressed opposition to a China-based data center, arguing that data transfer to the United States was the most efficient option, two people said.

Since 2021, Tesla has stored data collected by its Chinese EVs in Shanghai. Over that time, Tesla’s China team has been seeking approvals from Chinese regulators to transfer data out of the country, two people said.

Under a one-year pilot project, companies in Shanghai’s Lingang Area, where Tesla’s factory is located, will be allowed to transfer certain data without needing further security assessments, Reuters reported on Friday.

Some analysts see Musk as trying to make China a launchpad for self-driving in the same way Tesla’s 2019 bet on its Shanghai Gigafactory allowed it to break through as a mass-market electric vehicle maker.

Advertisement

“It would definitely be a milestone for Tesla if it rolls out FSD in China and leverages the China data for algorithm training,” said Yale Zhang, managing director at Shanghai-based consultancy Automotive Foresight.

“China had played a key role in scaling up EV production for Tesla with the Shanghai factory. It would again serve a significant part in scaling up mass adoption of autonomous driving technologies,” he said.

Many industry experts expect it will take years before fully autonomous cars are commonplace, but predictions vary widely.

Driver-assistance features now offered in China are “level two” systems, meaning they require a driver ready to take over. Tesla’s FSD and its less-advanced options of Autopilot, are also level-two systems requiring attentive drivers.

More fully automated vehicle fleets operated by Baidu China’s biggest search engine operator, and Pony.ai, an autonomous driving startup, run in limited test zones.

Advertisement

But China’s EV makers, including BYD, have made self-driving and advanced driver assist systems a priority. Mercedes and BMW have been granted licenses to test level-three systems that allow drivers to take their hands off the wheel and look away on a wider range of roads in China.

At least five automakers – Hyundai, Mazda, Toyota, Volkswagen, and Nissan- have approval to transfer some of their data out of China, but none of those approvals are for data to be used to train AI systems, according to lawyers, state media reports and analysts.

Penalties for violating data privacy laws that came into effect in China in 2021 are a major risk factor for data operations, groups representing foreign businesses in China say.

When asked about competition from Chinese EV makers during a call with investors after Tesla’s quarterly earnings last month, Musk said Tesla should be viewed more as an AI company.

He said he was confident Tesla’s FSD system would work “pretty well without modification in almost any market”. It would work better with “country-specific” training, Musk said.

Advertisement

Continue Reading

Tech

Reddit stock jumps after OpenAI partnership

Reddit stock jumps after OpenAI partnership

Published

on

By

Reddit stock jumps after OpenAI partnership

Shares of Reddit (RDDT.N) rose 14% on Friday, following a partnership with artificial intelligence firm OpenAI that is expected to draw in more users for the social media platform with AI-enhanced experience and attract more advertising revenue.

The stock was trading at $64.25 premarket, in touching distance of the highest closing price of $65.11 hit in late-March.
The partnership, announced on Thursday, allows Reddit to leverage OpenAI’s technology to build tools and features, and OpenAI’s ChatGPT platform to integrate Reddit’s content in a “real-time, structured” manner. OpenAI will also become an advertising partner for Reddit.

The pact delivers on Reddit’s “IPO promise of seizing opportunities to make more of AI, whether that’s deploying the tech on its platform to improve the user experience or feeding its content into AI language models,” said Russ Mould, investment director at AJ Bell.

Reddit, which primarily generates revenue from advertising, is seeking to diversify its income streams. In a February filing the company indicated its intent to explore new monetization channels, including offering creator tools and licensing its data to third parties.

Advertisement

Reddit already has data licensing agreements with undisclosed parties that are projected to contribute at least $66.4 million in revenue this year. The license allows third parties to access, search, and analyze data on the platform.

With a daily active user count of more than 80 million, Reddit is considered a smaller player in the social media market. The company went public on the New York Stock Exchange on March 21. Its shares have gained 66% from their IPO price of $34 a piece.

The deal comes amidst a growing number of lawsuits against OpenAI, with firms alleging unauthorized use of their content for training large language models.

In recent months, OpenAI has also secured content licensing deals with several publishers, including the Associated Press and the Financial Times.

Advertisement
Continue Reading

Tech

EU demands clarity from Microsoft on AI risks in Bing

EU demands clarity from Microsoft on AI risks in Bing

Published

on

By

EU demands clarity from Microsoft on AI risks in Bing

The European Commission could fine Microsoft (MSFT.O), opens new tab if it doesn’t provide adequate information on risks stemming from generative AI features in search engine Bing by May 27.

The Commission said on Friday that it is worried about the dissemination of deep fakes and automated manipulation of services that can mislead voters.

It said it was stepping up enforcement actions on the matter, as it had not received a reply to a request for information sent on March 14.

If the deadline is not met, the commission could fine Bing up to 1% of its total annual income with periodic penalties of up to 5% of its average daily income.

Advertisement

It can also fine the company if it provides incorrect or misleading information.

Tech companies are required to do more to tackle illegal and harmful content on their platforms under the European Union’s landmark Digital Services Act, which kicked in last year.

Generative AI is one of the risks identified by the commission for the integrity of electoral processes, in particular for the upcoming European Parliament elections in June.

Advertisement
Continue Reading

Trending

Copyright © GLOBAL TIMES PAKISTAN