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Category: physics – Page 231

New research adds knowledge on the creation and evolution of the universe

The Computational Cosmology group of the Department of Astronomy and Astrophysics (DAA) of Valencia University (UV) has published an article in The Astrophysical Journal Letters, one of the international journals with the greatest impact in Astrophysics, which shows, with complex theoretical-computational models, that cosmic voids are constantly replenished with external matter.

“This totally unexpected result can have transcendental implications, not only for our understanding of the large-scale structure of the , but on the settings for the creation and evolution of galaxies,” explains Vicente Quilis, director at the DAA and head researcher for the project.

“Cosmic voids are the largest structures in the cosmos, and knowledge on their creation and evolution is essential to understand the of the universe,” says Susana Planelles, co-director of the research. Studying them as a physical occurrence has always been extremely complex precisely due to being large volumes with very low material content. From an observational point of view, analyzing the few existing items inside them is very hard, and the theoretical modeling of these occurrences is no less complex, which is why highly simplified descriptions of these structures are used.

Type V: Technically in the lab scientists have created mini universes so we are closer to a type 5 civilization than we realize

A Type V civilization would be advanced enough to to escape their universe of origin and explore the multiverse. Such a civilization would have mastered technology to a point where they could simulate or build a custom universe. They will have mastered the new laws of physics and have almost complete control over the fabric of reality. Now, humanity is basically impossible to destroy by its own inhabitants, which has reached the decillions. The Q Continuum from Star Trek The Daleks and Time Lord.

The Warm Glow of our Cool Universe (Live Public Talk)

In order to explore the mysteries of our universe, we need to look at it in different ways. Astrophysics missions like SPHEREx and Euclid will use infrared astronomy to deepen our knowledge of unseen phenomena, such as inflation and dark matter. Join us as we explore how infrared observations are changing our understanding of the cosmos and its origins.

Speakers:
–Dida Markovic, Research Scientist, NASA/JPL
–Dr. Phil Korngut, Research Scientist at Caltech.
SPHEREx instrument scientist.

Host: marc razze, public services office, NASA/JPL

Co-host: kaitlyn soares, public outreach specialist, NASA/JPL

Space Force: A New Domain with Neil deGrasse Tyson

This week’s episode is brought to you by The Space Force. For more information, please go to http://www.spaceforce.com #sponsored.

How much of your life is touched by space? On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice break down the newest branch of the US military, The Space Force, with Charles Liu, Major General DeAnna Burt, and Dr. Moriba Jah. Is this one step closer to Star Wars?

Discover the alliance between astrophysics and the military. What ways are there to destroy a satellite? Charles Liu teaches us about electromagnetic pulses– EMPs– and how they disrupt electronics. Can people be safe from a detonated EMP, like in the movies? How do we protect ourselves against EMPs?

Next, we speak with Major General DeAnna Burt about her role within The Space Force and what it’s like to form an entire branch of the military from scratch. Who came up with the name Space Force? Is the creation of The Space Force an escalation of military tensions in the world? Is it a step towards war in space? Find out about geosynchronous robotic arms, kinetic kill vehicles, and what The Space Force really does to protect us against threats that exist already. We discuss satellites and just how much of daily life on earth is touched by space. How far does space go? Is The Space Force for the domain of the universe itself?

What’s the potential for warfare in space? Or the possibility of Star Wars? How do we work together to ensure fights don’t extend into space? Moriba Jah breaks down the objects we’re tracking in our orbit. What do you do when an object is on track to hit another object in orbit? We also discuss the Kessler Effect and what it means for the future of our orbits. How do you regulate and track the booming private satellite industry? All that plus, what about non-human threats?

Thanks to our Patrons Lisa Cotton, Luis Stark, Oscar h, Travis Mansfield, Justin Thomas, Josh Wise, and Astaroth for supporting us this week.

Continue reading “Space Force: A New Domain with Neil deGrasse Tyson” | >

Sonic Black Holes Could Let Us Finally Understand One of the Biggest Mysteries in Physics

There can be other kinds of black holes that trap other physical phenomena, like sound waves, and these kinds of black holes, known as sonic black holes, might be critical to understanding their light-consuming counterparts in the wider universe.

Most important of all, what can sonic black holes tell us about one of modern physics’ most contentious debates, the so-called Information Paradox? A recent study attempted to find out, and its results seem to make the problem more complicated, not less.

Bayesian Inference for Gravitational Waves From Binary Neutron Star Mergers in 3G Observatories

In the 2030’s, gravitational-wave detectors will be thousands of times more sensitive than Advanced LIGO

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory supported by the National Science Foundation and operated by Caltech and MIT. It’s designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. It’s multi-kilometer-scale gravitational wave detectors use laser interferometry to measure the minute ripples in space-time caused by passing gravitational waves. It consists of two widely separated interferometers within the United States—one in Hanford, Washington and the other in Livingston, Louisiana.

Physicists Create Time-Reversed Waves of Optical Light in Head-Spinning First

Circa 2020

Like watching a movie in reverse, physicists have just demonstrated a new technique for the time-reversal of a wave of optical light.

That doesn’t mean that they have actually reversed the flow of time; rather, they have found a way to induce an optical wave to retrace a forward path in reverse, returning to its point of origin.

It’s the first time that time reversal of optical waves has been achieved with full control over all of the degrees of freedom of light simultaneously.

New Vistas in Astronomy: Imaging a Black Hole with the Event Horizon Telescope

Thu, Sep 30 at 4 PM PDT.

Black holes are cosmic objects so small and dense that nothing, not even light, can escape their gravitational pull. Until recently, no one had ever seen what a black hole actually looked like. Einstein’s theories predict that a distant observer should see a ring of light encircling the black hole, which forms when radiation emitted by infalling hot gas is lensed by the extreme gravity near the event horizon. The Event Horizon Telescope (EHT) is a global array of radio dishes, linked together by a network of atomic clocks to form an Earth-sized virtual telescope that can resolve the nearest supermassive black holes where this ring feature may be measured. On April 10th, 2,019 the EHT project reported success: we imaged a black hole, and saw the predicted strong gravitational lensing that confirms the theory of General Relativity at the boundary of a black hole. This talk will cover how this was accomplished, details of the first results, as well as future directions that will enable real-time black hole movies.

About Dr. Shep Doeleman:

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