Random fluctuations in space-time

Prof. Nathan Rosen. Courtesy of the historical archive of the Technion by Yehoshua Nasiyo

Research Prof. Natan Rosen, 1995-1909

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Founder of the Faculty of Physics at the Technion, co-author of the historical article EPR with Albert Einstein and Boris Podolsky
The interference experiment

A new radical theory unites Einstein's theories of gravity with quantum mechanics

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Two articles by University College London researchers have been published in Nature Communications and Physics Magazine in which the researchers offer an elegant way to reconcile the contradiction between the two theories, each of which affects on a different scale
An artist's rendering of a collection of pulsars detecting gravitational waves from pairs of orbiting supermassive black holes. Credit: Aurore Simonnet for the NANOGrav Collaboration

Proof that the Earth is surrounded by a sea of ​​slow gravitational waves

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"The effect of gravitational waves on pulsars is very weak and difficult to detect, but we built the credibility of the findings over time as we collected more data," said Caterina Cazziano, NANOGrav team member and senior lecturer at Caltech.
Scientists say that stray planets, which wander through space when not bound to stars, far outnumber planets orbiting stars. Credit: NASA

Cosmic nomads: Roman space telescope could find 400 stray Earth-mass planets

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NASA's Nancy Grace Roman space telescope, which will be launched in May 2027, will be able to find an astonishing number of 400 Earth-mass stray worlds. Indeed, in the new study, one such candidate has already been identified
Impressively, a pair of supermassive black holes (top left) emit gravitational waves that propagate through the fabric of space-time. These gravitational waves compress and stretch the trajectories of radio waves that emit pulsars (in white). By carefully measuring the radio waves, a team of scientists recently discovered for the first time the gravitational wave background of the universe. Credit: Aurore Simonnet for the NANOGrav Collaboration

Noisier than expected: Gravitational waves from supermassive black hole mergers "heard" for the first time

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NANOGrav Discovers Stronger Gravitational Waves Than Ever, Apparently Created by Pairs of Supermassive Black Holes
Landmarks in the expansion of the universe. From Wikipedia

The uniformity of the cosmic background radiation

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Artist's illustration of the LuSEE-Night radio telescope on the Moon. (credit: NASA/Tricia Talbert)

Building telescopes on the moon could change the face of astronomy - and it is becoming an achievable goal

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The moon still has much to tell us about the origin and development of the solar system. It also has scientific value as a platform for observational astronomy
Photograph of Prof. Albert Einstein in New Jersey, 1947, hand-colored in 2022. Illustration: depositphotos.com

Albert Einstein - scientist and philosopher: the man who forever changed the perception of space and time

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Einstein is considered the greatest theoretician, along with Isaac Newton, the father of classical mechanics. His name became synonymous with genius. He gained worldwide fame in the first quarter of the 20th century thanks to the theory of relativity he developed
Quantum Physics Lab. Photo: Patrick Campbell, University of Colorado. From Wikishare

Quantum teaching - superposition of experiment and theory

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In this post, Kafir Soleimani details how, within the framework of the laboratory, the students smash the foundations of classical theory one by one, by recreating a series of ground-breaking quantum experiments published in the last four decades
Matter and even entire stars fall into a black hole. Illustration: depositphotos.com

Astronomers think they've spotted an 'invisible' black hole for the first time

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Holes managed to identify a black hole that matter does not fall into or that is not part of a binary system, thus essentially it is not exposed to the eye and to almost any other instrument * Several telescopes that are under construction or
This image allows us to see the dense dusty regions of space where star formation occurs. G. Li Causi, IAPS/INAF, Italy, CC BY

On the occasion of the launch of the Webb Space Telescope: the five most exciting telescope images of the universe

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Astronomers rarely use their telescopes just to take pictures. The images in astrophysics are usually created by a process of scientific inference and imagination, the visual expression of which is sometimes an artist's impression of what emerges
A spaceship leaves the galaxy. Illustration: depositphotos.com

Futuristic transportation - the speed of light 2: do the laws of physics allow it

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A wormhole - a tunnel between distant regions of the universe. Illustration: shutterstock

Physicists: The existence of (tiny) wormholes is possible

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Physicists from Germany are examining the theoretical possibility of the existence of tunnels in space-time, but only particles can pass through them, and they will immediately close

The first video of a time crystal

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In a joint study by researchers from Germany and Poland, a time crystal in action was filmed for the first time. The micrometer crystal consists of mechanisms at room temperature. With the help of X-ray radiation, the researchers from Berlin recorded the magnetization of the crystal over time and recorded it
Prof. Jeff Steinhauer. Photo: Nitzan Zohar, Technion Spokesperson

Permanent Hawking radiation was measured in the acoustic black hole at the Technion

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In an article published in the journal Nature Physics in early 2021, the research group showed that permanent (stationary) Hawking radiation was indeed emitted from the acoustic black hole. They measured 97,000 repetitions of the experiment which is equivalent to 124
The theory of connections. From Wikipedia

On the theory of connections and quantum mechanics

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In 2010, Edward Witten delivered a lecture to the general public on behalf of the IAS (Institute for Advanced Studies in the USA) on entanglement theory and quantum mechanics. In this article, we will convey the main points of his words with specific extensions
An illustration incorporating the black hole at the center of the M87 galaxy - the first imaged by astronomers. Illustration: shutterstock

Why is photographing the black hole such a special event?

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A first-of-its-kind photograph of a black hole at the center of the galaxy M87 by the EHT telescope array, which combines eight large telescopes from around the world. Photo: ESO

A first-of-its-kind photograph of a black hole at the center of a galaxy has been achieved thanks to an international collaboration

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The periodic table of tomorrow's professions - from the Egyptian hieroglyphs through the emoji language towards a new language

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Black hole simulation. Quantum entanglement and black holes, two seemingly unrelated phenomena, may lead physicists to the long awaited unification: the unification of general relativity and quantum mechanics. Image: Ute Kraus / Wikimedia.

A brief history of black holes

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The scientists designed a system that simulates the UNRO effect. In the diagram: the ripples on the surface of the water in the tank and the trajectory of the "space traveler" in space and time

A quantum vacuum effect was demonstrated in a tank of water

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From: "Life Begins Here". Illustration: Micah Lori

Chapter 12: Artificial Life from the book "Life Begins Here"

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The gravitational lensing of the galaxy LRG 3-757 imaged by the Hubble Space Telescope's Wide Field Camera #3. Photo: NASA/ESA / Hubble Space Telescope

Einstein's theory of relativity was also proven in a distant galaxy

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Photo: Hawking at Cambridge University. Lwp Kommunikáció / Flickr, CC BY-SA

The British Astronomer Royal, eulogized Hawking: "The concept of an imprisoned mind wandering in the universe captured people's imagination"

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Simulation of the merger of two black holes, the existence of which was indicated by the gravitational waves recorded by LIGO in 2017. Source: The SXS (Simulating eXtreme Spacetimes) Project.

Is dark matter made of black holes?

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What is the matrix we live in? Image: pixabay.

Einstein - the man who started to take us out of the matrix (part 3): there are gravitational waves!

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Black hole simulation. Quantum entanglement and black holes, two seemingly unrelated phenomena, may lead physicists to the long awaited unification: the unification of general relativity and quantum mechanics. Image: Ute Kraus / Wikimedia.

Closer to the secrets of the universe

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The NICER space telescope will study neutron stars during its construction. Photo: NASA

The telescope on the space station that will improve our knowledge of neutron stars will start operating

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The 2016 Harvey Awards ceremony. Photo: Nitzan Zohar, Technion spokesperson.

The 2016 Harvey Prize was awarded for the discovery of gravitational waves and the development of optogenetics

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The second discovery of gravitational waves in June 2016. The first ever was in February - illustration: from Wikipedia

Gravitational waves: the most important discovery of 2016 according to the editors of Science magazine

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An artist's illustration of the surface of Proxima b, an Earth-like world orbiting the closest star to the Sun - Proxima Centauri. Image: ESO / M. Kornmesser

2016: a fascinating scientific year

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Michael J. Fox, Doc Brown and the DeLorean used as a time machine

Fasten your belts, take off for the future...

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Scientists from the SLAC accelerator and Stanford University combined experimental data and theory to understand how the universe formed and what the future holds. Stringy clumps of dark matter (black regions) serve as scaffolds for the construction of cosmic structures made of normal matter (bright regions), which include stars, galaxies, and galaxy clusters. Figure: S Skillman, YY. Mao, KIPAC/SLAC National Accelerator Laboratory

What does the future hold for the universe? Learning about the future from the distant past

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Einstein's mistakes

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A summary of the history of time travel

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Why is Einstein important?

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Super symmetry. Illustration: shutterstock

Clean up after Einstein

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Graffiti drawing of Einstein and his famous formula. Photo: shutterstock

How Einstein reinvented reality

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A laser beam that travels 1,600 km in a tube. LIGO detector | Photo: NASA

First evidence for the discovery of gravitational waves

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Gravitational waves emanating from the merger of two black holes. Image: NASA/JPL

Proof of Einstein's theory of general relativity: "The discovery of gravitational waves opens a new window to the universe"

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Gravitational waves. Illustration: shutterstock

Have gravitational waves been found?

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A black hole and a plasma jet emerging from its vicinity consisting of materials ejected from the edge of the event. Illustration: shutterstock

Is it possible to extract energy from a black hole? / Adam Brown

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Illustration of the galaxy and the giant black hole at its center. The black hole converts some of the matter it absorbs into energetic radiation (shaded in blue), while the galaxy continues to form new stars (purple areas). [Image credit: Michael Helfenbein/Yale University - M. Helfenbein / Yale University]

The black hole that was ahead of its time

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The image of Einstein from a 1968 Israeli five pound banknote. Photo: Arkady Mazor / Shutterstock.com

The man who changed the universe: 60 years since the death of Albert Einstein

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suds. Illustration: shutterstock

Genesis was empty - how was our universe created? - The fifth and last part

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In this image you see real photographs of the cosmic background radiation as it is measured in the sky (right side). Above you see the cosmic radiation as it was first detected in 1965, the image is colored and the colors indicate the temperature (or frequency) of the radiation. Notice how uniform it is in temperature (there is only one green color). Middle image - in 1992 the Kobe satellite finds tiny differences in temperature (six digits after the decimal point). In the lower image you see a similar image with better spatial resolution taken in 2003. The red band in the middle is not related to the cosmic background radiation, it is micro radiation emitted from the plane of our galaxy

Genesis was empty - how was our universe created? - Part IV

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Wilson (left) and Penzias (right) against the background of the shofar antenna they used when discovering the cosmic background radiation. Source: Wikipedia

Genesis was empty - how was our universe created? - Part III

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An approximate model of the hydrogen atom, the simplest and most common atom in the universe consisting of a proton in the center and an electron around it. All the hydrogen in the universe was created about 380,000 years after the big bang.

Genesis was empty - how was our universe created? - Part II'

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the expanding universe. Illustration: from Wikipedia

Genesis was empty - how was our universe created? – Part I

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Orion Nebula. Photo: NASA. Processing: shutterstock

Low orbit - an ULTRASAT satellite based on Israeli technology, will scan the sky in the ultraviolet range

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