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Hubble discovers unusual wrinkles in the rate of expansion of the universe



Over the past 30 years, the Space Observatory has helped scientists discover and refine this rate of acceleration, as well as reveal puzzling problems that only new physics can solve.

Hubble has detected more than 40 galaxies containing pulsars as well as exploding stars called supernovae to measure large cosmic distances. These two phenomena help astronomers define astronomical distances as miles markers that indicate expansion rates.

In their quest to understand how rapidly our universe is expanding, astronomers made an unexpected discovery back in 1998: “dark energy.” This phenomenon acts as a mysterious driving force, accelerating the rate of expansion.

And there is another event: the inexplicable difference between the rate of expansion of the local universe and the rate of expansion of the distant universe immediately after the Big Bang.

Scientists do not understand the paradox, but admit that it is strange and may require new physics.

“You get the most accurate measure of the expansion rate of the universe with the gold standard for telescopes and space tilt markers,” said Adam Reese, Nobel Prize winner at the Space Telescope Science Institute and professor emeritus at Johns Hopkins University in Baltimore. in the current situation.

“That’s what the Hubble Space Telescope was built for, using the best technology we know. This is probably the Hubble magnum, because it will take another 30 years of Hubble’s life to double the size of this sample.”

decades of observation

The telescope is named after pioneering astronomer Edwin Hubble, who discovered in the 1920s that distant clouds in the universe are actually galaxies. (died 1953).

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Hubble built on astronomer Henrietta Swan-Levitt’s 1912 work to detect periods of brightness in pulsars called variable Cepheids. Cepheids act as cosmic tilt markers because they periodically light up and dim in our galaxy and beyond.

Hubble’s work led to the discovery that our galaxy was one of many that forever changed our perspective and our place in the universe. The astronomer continued his work and found that distant galaxies appear to be moving rapidly, suggesting that we live in an expanding universe that began with the Big Bang.

The discovery of the rate of expansion of the universe helped to achieve Nobel Prize in Physics 2011Awarded to Saul Perlmutter, Brian P. Schmidt and Riess “for their discovery of the accelerated expansion of the universe through observations of distant supernovae.”

Reiss continues to lead SHOES, short for Supernova, H0, for the equation of state for dark energy, a scientific collaboration that explores the expansion rate of the universe. His team publishes a paper in The Astrophysical Journal that provides the latest information on the Hubble constant since the expansion rate is known.

unresolved contradiction

Measuring distant objects has created a “cosmic distance ladder” that could help scientists better estimate the age of the universe and understand its foundations.

Several groups of astronomers using the Hubble telescope have come up with a Hubble constant of 73 plus or minus 1 kilometer per second per megaparsec. (One megaparsec is equal to one million parsecs, or 3.26 million light years.)

“The Hubble constant is a special number,” he said. “It can be used to thread a needle from the past into the present to test a comprehensive understanding of our universe. It required a huge amount of detailed work.” This was stated by a cosmologist from the Catalan Institute for Research and Advanced Studies and the Institute of Cosmology of the University of Barcelona Lecia Verdi.

Hubble discovers rare giant star struggling with self-destruction

But the actual rate of expansion expected from the universe is slower than the rate observed by the Hubble telescope, according to astronomers using the Standard Cosmological Model of the Universe (a theory that refers to the components of the Big Bang) and measurements made by the European Space Agency. Planck. work from 2009 to 2013.

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The Planck Observatory, another space-based observatory, was used to measure the cosmic microwave background, or residual radiation from the Big Bang 13.8 billion years ago.

Planck’s scientists achieved the Hubble constant of 67.5 plus or minus 0.5 kilometers per second per megaparsec.

about James Webb Space Telescope launched in Decemberwill be able to observe the Hubble tilt signals more accurately and at greater distances, which may help to understand the discrepancy between the two numbers.

This presents an exciting challenge for cosmologists who were once determined to measure the Hubble constant and are now wondering what additional physical data could help them unravel the new mystery of the universe.

“I don’t really care about the specific value of the scale, but I like to use it to understand the universe,” Reese said.

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Xiaomi POCO F4 GT disappoints in its gaming performance tests (video)



Xiaomi POCO F4 GT disappoints in its gaming performance tests (video)

Xiaomi POCO F4 GT is one of the cheapest smartphones on the market with a Snapdragon 8 Gen 1 processor. This is the Chinese company’s best offering for the gaming segment, but its performance leaves much to be desired.

This unfortunate scenario was once again confirmed in the latest POCO F4 GT test conducted by the Golden Reviewer Youtube channel. Compared to its peers, this Chinese smartphone could not keep up with the competition.

Xiaomi POCO F4 GT doesn’t want fps in Apex Legends Mobile

The newly released game Apex Legends Mobile was chosen to test the gaming performance of POCO F4 GT. Unfortunately for fans of the brand, the results put him at the end of the table.

On average, Xiaomi POCO F4 GT is presented only 47.5 fps during the gaming session, which you can see in the video above. Clearly poor performance for a smartphone with a strong focus on this market niche.

The performance limitations of the POCO F4 GT start to be noticed already in the third minute of the test. Then we started seeing performance drops for no apparent reason.

From the tenth minute of the test until its end, we see a constant performance in the region of 40 frames per second. Although the POCO F4 GT reached a peak speed of 60fps, it was unable to maintain those numbers throughout the test.

In first place in the table built by the Golden Reviewer channel, we have the Redmi K50 Pro with an average of 59.6 fps. This is an exclusive smartphone for the Chinese market, equipped with a Dimensity 9000 processor.

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For European consumers, we have the iPhone 13 Pro Max showing the best performance in this test with an average of 59.1 fps. For Android lovers, the Samsung Galaxy S22 Ultra came out on top with an average of 57.4 fps.

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Instagram is testing artificial intelligence to check the age of users



Instagram is testing artificial intelligence to check the age of users

Instagram is testing new ways to verify the age of its users, including an AI face identification tool to make sure people are 18 or older.

There are no tools yet to prevent children from accessing the Meta platform.

The use of artificial intelligence to identify faces, especially in teenagers, has raised some concerns given the Meta’s complicated history. when it comes to protecting user privacy.

Meta stressed that the technology used to check the age of people can’t find out your identity – only your age. After completion of Meta validation in partnership with startup Yoti delete face video.

The owner of Facebook and Instagram said that from today, if anyone tries to change their date of birth on the platform for posting videos and photos of people under or over 18, you will need to verify your age using one of these methods.

Meta continues to face questions about the negative impact its products, especially Instagram, have on some teens.

Technically, children must be at least 13 years old to join Instagram, similar to other social networks. But some solve this problem by lying about their age or by having their parents do it.

To use the face scan feature, the user has to send a “selfie” videosent to Yoti, a London-based startup that uses people’s facial features to estimate their age.

Yoti is one of several biometric companies that are capitalizing on the UK and European push for more reliable age verification technology. to prevent children from accessing pornography, dating apps, and other adult content.

“While Instagram is likely making good on its promise to remove images of candidates’ faces and not attempting to use them for individual facial recognition, the normalization of facial scans raises other social concerns,” a professor at Cambridge University Essex School of Law warned. (United Kingdom) Darag Murray.

In 2021, Meta announced that it was shutting down Facebook’s facial recognition system and removing the fingerprints of more than a billion people after years of scrutiny by courts and regulators.

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FEUP researcher will maintain a reference journal on engineering and applied sciences



FEUP researcher will maintain a reference journal on engineering and applied sciences

José Antonio Correia has been in the top 2% most cited scientists in the world since 2019 according to the Stanford University rankings. Photo: DR

Jose Antonio Correiaresearcher Institute for Research and Development in Structural and Construction (CONSTRUCT) as well as University of Porto Faculty of Engineering (FEUP) It’s from Institute of Science and Innovation in Mechanical Engineering and Industrial Construction (INEGI)recently appointed co-editor of the civil engineering department Alexandria Engineering Journal (Elsevier), the leading journal in engineering and applied sciences.

“I am honored to be part of a journal in which distinguished world-class professors and researchers participate as members of the editorial board, and at the same time to be recognized for my contributions to the fields of materials and engineering structures. I also express my gratitude to the institutions in which I work for the support and availability of the necessary funds for the development of my research activities and cooperation with the industry,” says the researcher.

Bye co-editorf, José Antonio Correia will have primary responsibility for managing submissions from the civil engineering academic community, putting them into the review and final decision process.

Scientific research and recognition

Since 2019, José Antonio Correia has been ranked among the top 2% most cited scientists in the world by Stanford University, having recently won the award. 2021 IGF Manson-Coffin Medal. He was also considered one of the most influential academics in the world during the period 2015-2021 in several scientific areas of fatigue such as SN curves, fatigue models applied to materials and structural parts, accumulated damage, metal bridges and structures. connections.

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Most recently, the EFUP researcher was appointed co-chair of the European Structural Integrity Society (ESIS) TC3 Technical Committee – Fatigue of Engineering Materials and Structures, a body on which he already served as Chairman of the TC12 Technical Committee – Safety and Risk Analysis of Large Structures and Structural Parts. In addition, he acted as an evaluator of European project proposals.

José Antonio Correia has also accumulated extensive experience in positions related to scientific publications in the field of engineering structures. Member of the editorial board of the journal International Journal of Fatigue (worldwide reference journal in the field of fatigue of engineering materials and structures) since January last year, is also the current Journal co-editor Smart infrastructure and constructionShe is working on this role with Noha Saleb, a professor at Middlesex University in London, United Kingdom.

In addition, he is the founder and current co-editor of Structural Integrity – Series (Springer), together with Abilio De Jesus, Professor of the Department of Mechanical Engineering of the FEUP, Editor-in-Chief of the Journal Department MDPI simulationmagazine editor Open study materials (F1000-Taylor & Francis), e Make editor-in-chief International Journal of Structural Integrity (Emerald).

Most recently, José Correia became a member of the editorial board Philosophical works A – Engineering sciences (Royal Society) e Technical failure analysis (Elsevier).

With a research activity “divided” between CONSTRUCT and INEGI, José Antonio Correia also teaches at the Faculty of Science and Technology of the University of Coimbra, at the University of Tras os Montes e Alto Douro (UTAD), as well as at the Department of Constructions of the Faculty of Civil Engineering and Geosciences Delft University of Technology (Netherlands).

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At FEUP, he is also co-coordinator, along with Professor Rui Calzada, of the Hyperloop-Verne project recently approved by the MIT Portugal program. The researcher has been co-coordinator of several research and university projects in the field of structural integrity, fatigue and failure of materials, engineering details and structures.

He also holds several honorary positions at the invitation of university institutions around the world such as Xi’an Jiaotong University (China), where he is an Associate Professor, or NIT Silchar (India) and Universidade Estadual Paulista (UNESP, Brazil), where he is an Invited professor.

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