Black holes

Artist's rendering of the heaviest pair of supermassive black holes: Using archival data from the Gemini North Telescope, a team of astronomers has measured the heaviest pair of supermassive black holes ever found. The merger of two supermassive black holes is a long-predicted but never-observed phenomenon. This pair provides insight into why such an event seems so unlikely in the universe. Credit: NOIR LAB

Astronomers have measured the heaviest pair of black holes ever found

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Data from the Gemini North Telescope provide a possible explanation for the halting of the merger of a pair of supermassive black holes at the center of a galaxy
This image shows the region of the sky where the record-breaking quasar, J0529-4351, is located. Using the European Southern Observatory's Giant Telescope (VLT) in Chile, this quasar was found to be the most luminous object known in the universe so far. This image was created from images that are part of the Computerized Sky Survey 2, while the smaller image shows the location of the quasar in an image from the Dark Energy Survey. Credit: ESO/Computerized Sky Survey 2/Dark Energy Survey

The brightest object in the universe has been discovered - powered by a massive sun-swallowing black hole

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The material being pulled toward this disk-shaped black hole emits so much energy that J0529-4351 is more than 500 trillion times brighter than the Sun
The LISA mission will be the first space-based observatory dedicated to detecting ripples in the fabric of space-time. Credit: ESA

Capturing the Ripples of Space-Time: The LISA Mission to Study Gravitational Waves

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The European Space Agency gets the green light for the first space observatory of its kind, dedicated to revealing space-time vibrations.
A dramatic scene in space with a black hole in the center. Around the black hole is a chaotic and dynamic environment, with bright stars. Prepared using artificial intelligence software for illustrative purposes and should not be considered a scientific image

Cracking the code: how intermediate-mass black holes form

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Intermediate-mass black holes (IMBHs) are a cosmic enigma, their very existence and mechanisms of formation shrouded in mystery
The central region of the Milky Way galaxy as photographed by the Sobro telescope. The image shows many stars in a field of view that is about 0.4 light-years wide. The star S0-6 (in the blue circle), the subject of this study, is about 0.04 light-years from the supermassive black hole Sagittarius A* (in the green circle). Credit: Miyagi University of Education/NAOJ

Across Time and Space: A Mysterious Star's Epic Journey to the Center of the Milky Way

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Research by an international team led by Shugo Nishiyama at Miyagi University shows that some of the stars closely circling the black hole at the center of the Milky Way galaxy may have come from a greater distance than previously thought, completely
Prof. Zvi Piren. Photo: Noam Chai

For the first time, Israeli researchers will participate in a black hole and neutron star research group

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Professor Zvi Piren, head of the Schwartzman Chair at the Rakah Institute of Physics at the Hebrew University and Professor Amir Levinson from Tel Aviv University will take part in a research group of the prestigious Simmons Foundation as part of an international collaboration
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.
Artist's impression of GRB 211211A. Credit: Soheb Mandhai @TheAstroPhoenix

Cosmic Gold Factory: A single kilonova produced very heavy elements in the amount of a thousand times the mass of Earth

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A highly unusual burst of high-energy light from a nearby galaxy is linked by scientists to a neutron star merger
Scientists observing the compact radio core of M87 have discovered new details about the galaxy's supermassive black hole. In this artist's view, the black hole's massive jet appears to rise from the center of the black hole. The observations on which this figure is based represent the first time the jet and the black hole's shadow have been imaged together, providing scientists with new insights into how black holes can launch these powerful jets. Courtesy of ESO

For the first time a black hole was photographed together with the turbulent environment near it

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In a recent paper published in the journal Nature, scientists analyzed new data from the Event Horizon Telescope (EHT) to produce the most detailed image yet of the supermassive black hole at the center of the galaxy M87
The distribution of dark matter in a segment of the southern sky. Based on data from the ACT observatory in Chile that operated between 2007-2022. Courtesy of Princeton University and the University of Pennsylvania

A new map of dark matter verifies Einstein's theory of general relativity

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A groundbreaking new map of dark matter has been created using data from the Dark Energy Survey (DES), in an international collaboration of astronomers and physicists. The map shows the distribution of dark matter in the southern sky region, and it is
The black holes discovered by the Gaia spacecraft. Figure: European Space Agency

The closest black hole to the solar system

An international team, which includes a group of researchers from Tel Aviv University, has identified the first black hole, Gaia BH1, which is 1500 light years from Earth
Gravitational waves are created by a pair of stars turning into black holes. Illustration: depositphotos.com

Gravitational waves light up the universe

Gravitational wave analysis hints at the way black hole pairs are formed
An artist's impression of two black holes about to collide and merge Image: depositphotos.com

Astrophysicists predict the strength of gravitational waves from merging supermassive black holes

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A team of researchers from Australia recently made a new prediction about the strength of this gravitational wave signal. The new estimate is based on data from the MassiveBlack-II imager, which simulates a massive region of space that resembles a dissecting
This is the first image of Sagittarius A* the supermassive black hole at the center of our galaxy. This is the first direct visual evidence of the presence of this black hole. Until now, it has been recognized for its influence on the stars close to it. The black hole was imaged using the Event Horizon Telescope (EHT), an array that joined together eight existing radio observatories around Earth to create one virtual "Earth-sized" telescope. The telescope is named after the event horizon, a nickname for the boundary of the black hole beyond which no light can escape. It took five years to process the image. Credit: EHT Partnership

Improving the ability to observe the black hole at the center of the galaxy will make it possible to test Einstein's theory of general relativity

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Says Dr. Shahar Hadar, a theoretical astrophysicist from the University of Haifa and Oranim College who also works in the development of the next generation of the Event Horizon Telescope. He also explains why it took five years to produce the photograph
This is the first photograph of Sagittarius A* the supermassive black hole at the center of our galaxy. This is the first direct visual evidence of the presence of this black hole. Until now, it has been recognized for its influence on the stars close to it. The black hole was imaged using the Event Horizon Telescope (EHT), an array that joined together eight existing radio observatories around Earth to create one virtual "Earth-sized" telescope. The telescope is named after the event horizon, a nickname for the boundary of the black hole beyond which no light can escape. Credit: EHT Partnership

Astronomers reveal for the first time a "radio snapshot" of the black hole at the heart of the Milky Way

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First image of the black hole at the center of our galaxy Sagittarius A* (Sagittarius Ai Kochav) which until now has been studied for its effect on other stars, this time we can see its event horizon. photographed
A simulation of a star system that was supposed to include the black hole closest to us, but in the end it was clarified that there is no black hole. Photo: ESO

A system in which the "nearest black hole" is allegedly found does not include a black hole

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In 2020, a team led by astronomers from the European Southern Observatory (ESO) reported the closest black hole to Earth, which is only 1000 light years away. But other researchers have disputed their results.
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
It is a complex picture of X-rays, molecular gas and hot ionized gas near the center of the galaxy. The orange shapes are glowing hydrogen gas. One of these shapes, at the upper end of the jet (see an illuminated image below) is interpreted as a hydrogen cloud that was hit by the jet and moved outward. The jet disperses the cloud into tendrils that move towards the north. Further down near the black hole are X-ray observations of highly heated gas in blue and molecular gas in green. These data are evidence that the black hole is occasionally accreted by stars or gas clouds, and is ejecting some of the very hot material along its axis of rotation. Credit: NASA, ESA, and Gerald Cecil (UNC-Chapel Hill); Image Processing: Joseph DePasquale (STScI)

The Milky Way's supermassive black hole is still humming long after a burst of powerful 'death rays'

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The Hubble Space Telescope photographed a bright knot of gas hit by an invisible jet from the black hole, which is only 15 light years away. The black hole must have looked bright billions of years ago as a quasar
A black hole swallows its companion star. Illustration: shutterstock

Two gravitational wave events within 10 days: black holes have been discovered that eat neutron stars - "like Pac-Man"

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The Laser Interferometer Gravitational Wave Observatory (LIGO) in the US and the Virago Gravitational Wave Observatory in Italy captured the gravitational waves from the death spiral and merger of a neutron star with a black hole, and not once but
A black hole with a warped disk. Credit: John Paice

A strange black hole with a massive distortion in its accretion disk has been discovered

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An international team of astrophysicists from South Africa, the UK, France and the US have found great variation in the brightness of light seen around one of the closest black holes in our galaxy, 9,600 light-years from Earth, and they
A jet emitted from a black hole at the center of a galaxy. Illustration: shutterstock

Why supermassive black holes keep growing at the centers of massive galaxies

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Researchers from the Hebrew University and France discovered that below the critical size there are factors that prevent black holes from swallowing gas and growing, in galaxies with a mass of more than ten million suns, the attraction is large enough to attract
Colliding neutron stars can create solar-mass black holes. Credit: Robin Dinell / Carnegie Institution for Science

What is the connection between stellar black holes and dark matter?

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When LIGO and Virgo observe more black star collisions, they may observe many small black stars. If that happens, we may have to examine this idea of ​​darker matter more carefully
A star is torn apart by a black hole and emits jets of gas and radiation. Image: NASA/JPL

Stars engulfed by a black hole release energy long after the process begins

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Dr. Assaf Haresh of the Hebrew University revealed a new and surprising phenomenon concerning the destruction of stars by black holes* so far no researcher has been able to prove that such flashes of radio radiation exist, for a long time

The black hole at the center of the Milky Way is slowly spinning, but what does that mean?

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The black hole at the center of the Milky Way is slowly spinning, but what does that mean?
Star S2 orbiting the black hole at the center of the galaxy - Sagittarius (Sagittarius) *A, one of the proofs for the existence of the black hole at the center of the galaxy, from the research of 2020 Nobel Prize winners Reinhart Ganzel and Andrea Gas. From Wikipedia. By ESO/M. Kornmesser - https://www.eso.org/public/images/eso1825b/ , CC BY 1825, Link

"Without the observations of Ganzel and Gas, the whole subject of black holes would have remained theoretical"

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Left: The remnants of a rogue star ripped apart by the black hole crash onto the disk, while the hot region above it is still radiating X-rays. Right: The crashed star disrupted the gas disk, turning off the X-rays. Credit: Robert Hurt, NASA /JPL

What interrupted a supermassive black hole's feast?

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Researchers have identified a star that got too close to the "dinner table" and was swallowed up as well
Black holes collide in close proximity to a supermassive black hole. Image: CUNY

Astronomers find evidence of colliding black holes that emitted light

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An artist's impression of the formation of the quasar Pōniuā`ena, which began with a primordial black hole, 100 million years after the Big Bang. Illustration: International Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld

A monstrous black hole with a billion solar masses has been discovered in the early universe

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This artist's impression shows the orbits of the objects in the triple system HR 6819. This system consists of an inner pair with one star (orbit in blue) and a recently discovered black hole (orbit in red), as well as a third object, another star, in a wider orbit (also in blue). Figure: ESO/L. Calçada

The closest black hole to our solar system has been discovered

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Observations made with the European Southern Observatory's (ESO) Very Large Telescope (VLT) have revealed for the first time that a star orbiting the supermassive black hole at the center of the Milky Way moves exactly as Einstein predicted in his theory of general relativity. Its orbit is in the shape of a rosette and not in the shape of an ellipse as Newton predicted in his theory of gravity. Figure: ESO

ESO's Giant Telescope in Chile watched the star dance around the supermassive black hole at the center of the Milky Way; Proves that Einstein was right

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merging galaxies. Image: shutterstock

The black hole at the center of the Milky Way may have a friend

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Image: This figure shows tidal disruption, which occurs when a star passes too close to a black hole and is torn apart and turned into a stream of gas. Some of the gas eventually settles into a structure around the black hole called an accretion disk. Image: NASA's Goddard Space Flight Center

The Tess space telescope observed a star engulfed in a black hole

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The galaxy NGC 3417 (left). And an image of the disk surrounding the giant black hole at its center. Photo: Hubble image: NASA, ESA

A black hole with a disk that shouldn't have been around it

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Prof. Jeff Steinhauer. Photo: Nitzan Zohar, Technion Spokesperson

Confirmation for Hawking: Artificial black hole quantitatively confirms the temperature and thermal nature of Hawking radiation

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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 cover of the book "The Divine Particle"

The divine particle - Higgs boson and the greatest hunt in science: "not the end of the world"

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Image: A disk of gas feeding a massive black hole, while emitting radiation" Credit: Image credit: NASA/JPL-Caltech

Israeli astronomers have identified an unknown phenomenon that feeds and grows giant black holes very quickly

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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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Simulation of a jet of gas from material thrown into the black hole at the center of the galaxy 3C273 - which is an active quasar. Illustration: Courtesy of Prof. Hagi Netzer

How much does a supermassive black hole weigh?

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Illustration of a neutron star and black hole merging. Credit: Dana Berry/NASA

Will gravitational waves be able to shed light on the expansion rate of the universe?

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For the first time, a plasma jet from a black hole at the center of a radio galaxy has been imaged

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Prof. Stephen Hawking in a plane that allows training in zero gravity conditions. Photo: NASA

Prof. Stephen Hawking died in his sleep * He studied black holes and was a social activist

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1. Giorgio Pelucci, Scientific Director of the SESAME Regional Particle Accelerator inaugurated in Jordan. Photo: Ruth Lower, Technion spokeswoman.

Dinosaurs, black holes and the regional particle accelerator - at an international conference at the Technion

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Imaging of the quasar J1342+0928, the active galactic halo that contains at its center a supermassive black hole, with a mass 800 million times that of our Sun, that is gobbling up a lot of material from a hot disk surrounding it. Source: Robin Dienel/Carnegie Institution for Science.

The most distant supermassive black hole to date has been discovered

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A simulation of a supermassive black hole with an accretion disk around it. Image: NASA/JPL-Caltech.

A method that significantly improves the measurement of the mass of black holes in the centers of galaxies

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Imaging a kilonova: the merger and collision of two tiny but highly compressed neutron stars. Source: ESO/L. Calçada/M. Kornmesser.

The prediction from 1989 that came true and the rapid mobilization of astrophysicists to observe the source of gravitational waves with other detectors as well

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Simulation of the collision of two small but compact neutron stars. Such a rare event is expected to create both gravitational waves and a gamma-ray burst, both of which were observed on August 17, 2017. Source: University of Warwick/Mark Garlick.

For the first time, gravitational waves and light waves were discovered from the same event - the merger of two neutron stars

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Imaging a kilonova: the merger and collision of two tiny but highly compressed neutron stars. Source: ESO/L. Calçada/M. Kornmesser.

Observed for the first time: collision and merger of two neutron stars

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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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