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Quantum reality, quantum worlds – new book explores quantum foundations

[“Quantum foundations” series] Theoretical physicist Sean Carroll recently published a new book. I’ve read some of his books. His blog, podcast. Articles. He has a robust online media presence. And is skilled at promoting his new book (or has a skilled publicist). So, I’ve read several articles on different sites about his new book, as… Continue reading Quantum reality, quantum worlds – new book explores quantum foundations

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An astronomer’s paradise — Chile

I just added another “big science” ground telescope to my Experiments page — the GMT. Astronomers claim that the images from these giant telescopes will be better than those sent to earth by the Hubble space telescope. Yet another in Chile. Then I recalled recently reading about Chile as an astronomer’s paradise. Here’s a sampling… Continue reading An astronomer’s paradise — Chile

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Celebrating X-Ray Astronomy — Chandra

This Space.com article “NASA Unveils Amazing Cosmic Views as Chandra X-Ray Observatory Turns 20” (July 28, 2019) reminded me of the limited vision provided only with visible light. Consumer security (and other) cameras have accustomed more of us to regularly seeing infrared light (a longer wavelength part of the electromagnetic spectrum). And that “light” behaves… Continue reading Celebrating X-Ray Astronomy — Chandra

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Image of entangled photons?

[Topic placeholder] [Developing story] Today’s news cycle contains articles about research by some physicists at the University of Glasgow who claim to have imaged entangled photons. Looks like they used a precision laser-based, table-top optical bench system. This Cnet article is a basic summary of the research: “Einstein called it ‘spooky action.’ Here’s an image… Continue reading Image of entangled photons?

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Swaying quantum vacuum energy vs compelling charge

[“Models of the quantum vacuum” series] I read this article today “‘The Unknown Question’ — The End of Spacetime” (June 22, 2019) and watched the included YouTube videos. Something bothered me which I’ve been thinking about for years, namely, that even theoretical physicist Nima Arkani-Hamed sounded like he viewed the electron as like a spherical… Continue reading Swaying quantum vacuum energy vs compelling charge

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The proton and perturbation problem

[Draft] [“Building a ‘verse” series] I’ve cited this physicist’s video elsewhere, but Perimeter Institute’s overview of her lecture includes a helpful characterization of perturbation theory in the context of understanding the proton better: “Phiala Shanahan builds the universe – with a new approach to calculations and the aid of supercomputers, Emmy Noether Visiting Fellow Phiala… Continue reading The proton and perturbation problem

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Humans fit for space? — NASA’s Twins Study

[See comments for updates.] Today Wired.com (among others) published an article “Are Humans Fit for Space? A ‘Herculean’ Study Says Maybe Not” which summarizes NASA’s Twins Study which was published in Science (The NASA Twins Study: A multidimensional analysis of a year-long human spaceflight). Wired: In space, fluids won’t drain, and astronauts develop red, puffy… Continue reading Humans fit for space? — NASA’s Twins Study

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Photographing a black hole?

As teased earlier this month, today the Event Horizon Telescope (EHT) project announced and presented the first ever photographs of a black hole — “the last photon orbit.” Another epic story of big science and an international team. The interplay of models and simulations, data capture, and complex processing. And funding. Much news coverage. Here’s… Continue reading Photographing a black hole?