Falling space debris poses an escalating risk as spacecraft get stronger and more heat resistant
When it comes to space debris, what goes up is coming down more often—and not safely.
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כתבות אחרונות מאתר 'Phys'
When politics enter the picture, credentials take a back seat
Most Americans know what a real expert's credentials look like: relevant degree, years of experience, and respect from peers. The problem, according to a study recently published in Scientific Reports, is that none of it matters as much once we find out their politics.
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eROSITA discovers a 'changing-look' Seyfert galaxy
Astronomers have tracked a dramatic "changing-look" active galactic nucleus (AGN) whose central supermassive black hole appeared to switch off and then rapidly reignite. The galaxy, HE 1237−2252, dimmed in X-rays by a factor of 17 within just 18 months before recovering again. The paper outlining its analysis was uploaded to the arXiv preprint server on May 8.
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Surrounded by stardust: Antarctic ice cores confirm Earth is accumulating iron-60 from local interstellar cloud
Our solar system is currently passing through the Local Interstellar Cloud, a region of highly diluted gas and dust between the stars. On its path, Earth continuously accumulates iron-60, a rare radioactive isotope of iron produced in stellar explosions. This has now been confirmed by an international research team led by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) through the analysis of Antarctic ice tens of thousands of years old. From the steady but time-varying influx, the researchers conclude that the radioactive isotope has been stored within the cloud since a long-past stellar explosion. The results have been published in the journal Physical Review Letters.
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How short-form videos may aid the teaching of small-engine maintenance
The 1974 novel "Zen and the Art of Motorcycle Maintenance" offered a simple but enduring idea: Working on machines should not be about just fixing them, but slowing down, paying attention, and reflecting on both the work and oneself in the pursuit of quality.
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People overestimate how confident AI systems are in their responses, experiments reveal
Artificial intelligence (AI) systems, particularly conversational agents such as ChatGPT or Gemini, are now used daily by a growing number of people worldwide. While many users trust the answers of AI agents to their queries, these are not always accurate and reliable.
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Musk wants SpaceX to go public. Here's how it works
Hundreds of companies raised a combined $70 billion by selling shares to the public in the United States last year.
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New spacecraft will watch Earth's shield take the hit as solar storms come roaring in
A joint European-Chinese spacecraft is set to blast off Tuesday to investigate what happens when extreme winds and giant explosions of plasma shot out from the sun slam into Earth's magnetic shield.
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We tested the new World Cup ball. This is what you need to know about how it will fly, dip and swerve
Every four years, the men's World Cup delivers some certainties. The pitch dimensions are tightly regulated, offside is signaled with a flag, and referees end the match with a blast of a whistle. But one key piece of equipment is changed on purpose: the ball.
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Hidden cell networks emerge in 3D as new nanoscopy tracks living bridges
A new nanoscopy technique developed at The Australian National University (ANU) has uncovered hidden networks used for communication between cells, opening new ways to understand human diseases. Described in an article published in Nature Communications, the method allows researchers to observe how living cells interact with their environment over several days, revealing three-dimensional behaviors that were previously invisible to conventional microscopes.
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