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When satellites stop inspiring wonder

Phil Plait begins with a change in perspective. As a teenager, he felt awe when he first spotted a satellite sliding across the night sky. Today the same sight fills him with dread. The difference is scale. Satellites are no longer occasional visitors overhead. Companies and governments are building constellations of thousands of spacecraft, and proposals for much larger swarms could turn low-Earth orbit into industrial infrastructure.

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Quantum mechanics is one of science’s most successful theories, but success has not made it intuitive. Its predictions have survived experiment after experiment and underpin modern electronics. Yet its usual mathematical description allows particles to exist in several possible places at once until a measurement returns one definite result. Entangled particles add another puzzle: measuring one appears to determine the state of another, even across a great distance. Physicists agree that the calculations work. They still disagree about what kind of reality those calculations describe.

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Robin George Andrews treats the new push back to the moon as more than a spaceflight milestone. If NASA’s Artemis program and related robotic missions create a lasting presence there, the moon could become a scientific instrument in its own right: a quiet, ancient body covered with clues that Earth has largely erased. Plate tectonics, weather, oceans and life have constantly recycled Earth’s oldest rocks. The moon, by contrast, has preserved much of its early history in place.

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Joseph Howlett’s article argues that the return to the moon is not only a human-spaceflight story. It could also reshape astronomy. NASA’s Artemis program, along with related commercial lunar landers, is opening a way to place scientific instruments on the lunar surface. For astronomers facing shrinking support for conventional observatories, the moon offers something rare: a physically stable, radio-quiet and human-serviceable platform close enough for repeated missions but different enough from Earth to make new measurements possible.

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Artemis II was designed as a test flight, but Nadia Drake frames it as something larger: the moment human spaceflight returned to the moon after more than half a century. The mission did not land. Instead, commander Reid Wiseman, pilot Victor Glover, mission specialist Christina Koch and Canadian mission specialist Jeremy Hansen rode NASA’s Orion spacecraft on a looping 10-day path around the moon, proving out the systems that are supposed to support later lunar landings and, eventually, a sustained human presence near the lunar south pole.

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The hard question after the race to build one

This article starts from a useful shift in perspective. The field has spent decades asking whether quantum computers can be built at all. Now that companies and laboratories can assemble machines with hundreds or thousands of qubits, the sharper question is what those machines will actually be good for.

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Why quantum computing is at an inflection point

This article asks a deliberately hard question: are quantum computers about to become a world-changing technology, or are they still a fragile research program surrounded by too much hype? The answer is neither simple optimism nor dismissal. Quantum computing is real, the article argues, and it has already moved from blackboard theory into working machines built by companies such as Rigetti, IBM and Google. But the machines that exist now are still far from the large, reliable systems needed to solve useful problems better than ordinary computers.

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Shapes Beyond Their Outlines

Rachel Crowell’s article turns a survey of mathematicians’ favorite shapes into a tour of how modern mathematics thinks. The premise sounds almost playful: ask specialists to name beautiful or intriguing forms and explain why they matter. But the answers quickly show that, for mathematicians, a shape is rarely just an outline. It can be a way to classify spaces, encode choices, study motion, compare dimensions, or translate a hard problem into a more workable language.

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Seeing Mines with Particles from Space

Adam Bluestein’s article turns a mining story into a physics story. The pressure begins with copper and other critical minerals, whose demand is rising as grids, electric vehicles, batteries and other clean-energy systems scale up. Existing mines are being asked to produce more, even as their ore gets poorer and new discoveries take many years to become working operations. The result is a basic problem of vision: mining companies need to know much more about what is underground before they dig, blast or send workers into unstable spaces.

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A Provocation from Inside Physics

Lee Billings’s interview with Gerard ’t Hooft turns a deceptively simple complaint into a broad argument about the future of fundamental physics. ’t Hooft is not an outsider taking shots at quantum mechanics. He is a Nobel-winning theorist whose work helped make the Standard Model mathematically coherent and who later proposed the holographic principle, one of the ideas that shaped modern quantum-gravity research. That background makes his impatience with quantum mystery harder to dismiss.