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Scientists Unveil the Core of a Fading Star

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the recently identified supernova, labeled SN 2021yfj, provides an extraordinary insight into the processes involved in the demise of stars. Researchers at Northwestern University made this finding. Initially detected in 2021 by the Zwicky Transient Facility, it was subsequently examined closely at the W.M. Keck Observatory in Hawaii.

In contrast to typical supernovae, SN 2021yfj displayed spectral features primarily characterized by silicon, sulfur, and argon. These elements are usually located far within massive stars, whereas their exterior layers are mainly composed of hydrogen and helium. This indicates that this specific star had its outermost layer removed, leaving its core exposed prior to the final detonation.

The research was published in the August 2025 issue of Nature by astronomer Steve Schulze and his team. In their findings, they question established models of stellar mass loss and introduce a novel category of stellar explosion. This unusual discovery reinforces traditional theories regarding the layered structure of massive stars. Nonetheless, it raises new inquiries about how much matter stars can shed before their explosive end.

IFA 2025 Opens with Focus on Solidarity in the Face of Global Unrest

IFA’s transformation from a business-to-business gathering to one that also includes consumers. New features consist of IFA Moments, which goes beyond product debuts with live performances, a Creator Hub, and a fresh collaboration with TikTok, which will be highlighting moments from the event in the upcoming days.

“IFA has consistently focused on transformation, but what has truly propelled us over the last few years is the shift toward a contemporary trade show. It’s not solely about the industry but involves attendees, exhibitors, and various generations uniting,” stated Dr. Sara Warneke, managing director of GFU, the body responsible for IFA.

The 5 Most Significant Earthquakes in Documented History

an initiative that also includes the application of AI recently.

The strength of an earthquake is assessed in terms of magnitude, based on the straightforward principle that a greater magnitude signifies a larger earthquake. Magnitude utilizes a logarithmic scale: Each whole number increment denotes a tenfold increase in measured amplitude and approximately 32 times more energy released. A magnitude two earthquake is ten times more powerful than a magnitude one, and so forth, with the strongest earthquakes on record occurring in the magnitude nine range.

Many may have heard individuals refer to earthquake magnitude as the “Richter Scale,” but this term has become obsolete. The Richter Scale was an early magnitude assessment system introduced during the 1930s, which eventually had to be retired as it could not accurately gauge the largest quakes. Nowadays, we utilize an improved scale known as Moment Magnitude. This advancement has enabled us to quantify the five most intense earthquakes ever recorded, which surpass anything the former scales could comprehend.

Judge Rules Google May Keep Control of Chrome Even with Antitrust Breaches

was aimed at dismantling Google, akin to the breakup of AT&T into multiple units during the 1980s. The DOJ’s efforts in this area were broadly regarded as excessively aggressive and ambitious, so it’s not surprising that Mehta was unconvinced by the DOJ’s argument. Mehta specifically stated that compelling Google to divest Chrome was illogical as it would be “incredibly messy and highly risky.”

Additionally, Mehta determined that Google’s arrangement with Apple, where Chrome serves as the default search engine on mobile Safari, may proceed. This is certainly positive news for Apple since its agreement with Google generates the company $20 billion annually in straightforward revenue. One limitation for the agreement moving forward is that Google cannot establish a multi-year contract to designate Google as the default search engine on the iPhone. Thus, while the collaboration between Apple and Google may persist, any contract’s length is restricted to just one year. Following that, the bidding process for becoming the default search engine on the iPhone will restart.

Moreover, Mehta indicates that Google will be required to provide a portion of search engine data to competitors, which will facilitate their ability to index the web and present relevant search outcomes. The goal is to slightly equalize the competitive landscape and offer search engines like Bing and DuckDuckGo a greater opportunity to contend against Google, which holds around 90% of the search engine marketplace.