Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog

Category: physics – Page 35

Does the universe behave the same way everywhere? Weak gravitational lensing could provide an answer

A study published in the Journal of Cosmology and Astroparticle Physics (JCAP) presents a methodology to test the assumption of cosmic homogeneity and isotropy, known as the Cosmological Principle, by leveraging weak gravitational lensing—a light distortion effect described by general relativity—in astronomical images collected by new observatories such as the Euclid Space Telescope. Finding evidence of anomalies in the Cosmological Principle could have profound implications for our current understanding of the universe.

“The Cosmological Principle is like an ultimate kind of statement of humility,” explains James Adam, astrophysicist at the University of the Western Cape, Cape Town, South Africa, and lead author of the new paper. According to the Cosmological Principle, not only are we not at the center of the universe, but a true center does not exist.

A further assumption, similar to but distinct and independent from homogeneity, is that the universe is also isotropic, meaning it has no preferred directions. These assumptions underlie the Standard Model of Cosmology, the theoretical framework used to explain the origin, evolution, and current state of the universe. It is currently the most robust and consistent model, verified by numerous scientific observations, though not yet perfect.

Physicists stabilize superconducting states at ambient pressure

Researchers at the University of Houston’s Texas Center for Superconductivity have achieved another first in their quest toward ambient-pressure high-temperature superconductivity, bringing us one step closer to finding superconductors that work in everyday conditions—and potentially unlocking a new era of energy-efficient technologies.

In their study titled “Creation, stabilization, and investigation at of pressure-induced superconductivity in Bi0.5 Sb1.5 Te3,” published in the Proceedings of the National Academy of Sciences, professors Liangzi Deng and Paul Ching-Wu Chu of the UH Department of Physics set out to see if they could push Bi0.5 Sb1.5 Te3 (BST) into a under pressure—without altering its chemistry or structure.

“In 2001, scientists suspected that applying high pressure to BST changed its Fermi surface topology, leading to improved thermoelectric performance,” Deng said. “That connection between pressure, topology and superconductivity piqued our interest.”

Scientist publishes fascinating ‘evidence’ that we all live inside a computer simulation

The simulation hypothesis suggests that our entire universe and reality could just be hyper-enhanced reality illusions.

He believes recent developments in the field of information physics ‘appear to support this possibility’ in that the physical world is made up of bits of information.

Vopson goes even further by claiming that information might have physical weight and could be a key part of the universe.

Alan Love — Philosophy of Reductionism & Emergence

Make a tax-deductible donation of any amount to help support Closer To Truth continue making content like this: https://shorturl.at/OnyRq.

Can biology be explained entirely in terms of chemistry and then physics? If so, that’s “reductionism.” Or are there “emergent” properties at higher levels of the hierarchy of life that cannot be explained by properties at lower or more basic levels?

Alan C. Love, Ph.D., is a professor in the College of Liberal Arts at the University of Minnesota. He also serves as director of the Minnesota Center for Philosophy of Science.

Shop Closer To Truth merchandise for unique items like notebooks, mugs, and sweatshirts: https://bit.ly/3P2ogje.

Closer To Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.

Physicists Are Using Time Itself to Crack the Dark Matter Puzzle

Using atomic clocks and ultra-stable lasers, they tracked subtle changes in time to detect hidden dark matter waves. By measuring precision shifts across vast distances, the study opens doors to new discoveries in fundamental physics.

Unveiling Dark Matter with a Bold New Approach

A team of international researchers has developed a novel method to investigate dark matter, the mysterious substance believed to hold galaxies together.

Stanford engineers build a water-droplet based computer that runs like clockwork

Manu Prakash, an assistant professor of bioengineering at Stanford, and his students have developed a synchronous computer that operates using the unique physics of moving water droplets. Their goal is to design a new class of computers that can precisely control and manipulate physical matter. For more info: http://news.stanford.edu/news/2015/ju…

Music: “Union Hall Melody” by Blue Dot Sessions.

A final ‘pure’ tone emitted after a collision of neutron stars may reveal their interiors

Scientists at Goethe University Frankfurt have identified a new way to probe the interior of neutron stars using gravitational waves from their collisions. By analyzing the “long ringdown” phase—a pure-tone signal emitted by the post-merger remnant—they have found a strong correlation between the signal’s properties and the equation of state of neutron-star matter. Their results were recently published in Nature Communications.

Neutron stars, with a mass greater than that of the entire solar system confined within a nearly perfect sphere just a dozen kilometers in diameter, are among the most fascinating astrophysical objects known to humankind. Yet, the in their interiors make their composition and structure highly uncertain.

The collision of two neutron stars, such as the one observed in 2017, provides a unique opportunity to uncover these mysteries. As binary neutron stars inspiral for millions of years, they emit , but the most intense emission occurs at and just milliseconds after the moment of merging.

The Geometry of Causality

Viewers like you help make PBS (Thank you 😃). Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE

Using geometry we can not only understand, but visualize how causality dictates the order of events in our universe. Start your Audible trial today at http://www.audible.com/spacetime.

You can further support us on Patreon at / pbsspacetime.
Get your own Space Time t­shirt at http://bit.ly/1QlzoBi.
Tweet at us! @pbsspacetime.
Facebook: facebook.com/pbsspacetime.
Email us! pbsspacetime [at] gmail [dot] com.
Comment on Reddit: / pbsspacetime.

Help translate our videos! In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another. Important Reference Episodes: The Speed of Light is not about Light (1:16) • The Speed of Light is NOT About Light Can You Trust Your Eyes in Space Time? (1:16) • Can You Trust Your Eyes in Spacetime? Previous Episode: Why Quasars are so Awesome • Why Quasars are so Awesome | Space Time Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown (www.kornhaberbrown.com) Comments Answered by Matt: Michael Lloyd • The Phantom Singularity | Space Time Jose Hernandez • The Phantom Singularity | Space Time Joan Eunice • Why Quasars are so Awesome | Space Time Mike Cammiso • Why Quasars are so Awesome | Space Time Bikram Sao • Why Quasars are so Awesome | Space Time Cinestar Productions • Why Quasars are so Awesome | Space Time Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang Henry Van Styn David Nicklas Quasar Jelle Slaets Tambe Barsbay Joel Brinton Luna IT Solutions Hypernova Joe Chuck Zegar Craig Peterson Jordan Young Ratfeast John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Bernardo Higuera Erik Stein Daniel Lyons Avan & Kyan Griggs Bernardo Higuera Jade Bilkey Kevin Warne JJ Bagnell J Rejc Michael Fischer Dylan Merida Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss Eric Jackson Will and Sonja Marple.

In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another.

Important Reference Episodes:

Continue reading “The Geometry of Causality” | >