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Black holes

The mysterious life of hot compact objects in space. Credit: The Science website via DALEE. The image should not be seen as a scientific image

Cosmic Mysteries Revealed: The Short and Brilliant Lives of Compressed Compact Objects

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A new study reveals details of an unknown class of galaxies called compact compact objects (CSOs) that emit jets moving in opposite directions at speeds close to the speed of light
Scientists have discovered a large black hole that "hiccups", and emits gas fluxes. Analysis revealed that a small black hole repeatedly punctures the gas disk of the large black hole, causing the perturbations to be released. Strong magnetic fields, north and south of the black hole, shown by the orange cone, shoot the flux up and out of the disk. Each time the small black hole punctures the disk, it emits another star, in a regular periodic pattern. Credit: Jose-Luis Olivares, MIT

Black hole "hiccuping" - astronomers are surprised by periodic eruptions in a distant galaxy

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In a distant galaxy, the supermassive black hole's intermittent gas fluxes led to the discovery of a smaller black hole in its orbit
Artificial intelligence reveals a long-standing mistake in the study of black holes. Credit: The Science website via DALEE

Artificial intelligence reveals a long-standing mistake in the study of black holes

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A new study, led by the UK's University of Bath, has found that supermassive black holes need both merging galaxies and cold gas to grow. This discovery, obtained through machine learning, may change our understanding of galaxy evolution
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
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 Shogo 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 further away than previously thought, completely outside the Milky Way.
A multi-wavelength view of the surroundings of the supermassive black hole SgrA* (yellow X). In the red of the stars, in the blue of the dust. Many of the young stars are hidden by the dust or absorbed by the bright stars. Credit: Florian Peissker / University of Cologne

Stellar surprise: a fountain of youth at the center of our galaxy "should be impossible".

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Researchers have found that the star cluster IRS13 near the supermassive black hole SagittariusA* at the center of our galaxy is much younger than predicted
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, the holder 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 cooperation in mathematics and physical sciences for the study of neutron stars and black holes
Optical image of the galaxy where the new event occurred, from PanSTARRS archive data. The x-ray itself is somewhere inside the white circle, and is about the size of a pinhead from 100 meters away. Also shown is the location of a two-year-old supernova. Credit: Daniele B. Malesani / PanSTARRS

Stellar feast: A ferocious black hole "drinks" the equivalent of three Earths from a star every time it passes

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A Sun-like star located in a galaxy roughly 500 million light-years away is being gradually devoured by a black hole, shedding a mass equal to three Earths on each close pass.
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.
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
Gravitational waves. Illustration: depositphotos.com

An innovation in gravitational wave detectors could help decipher cosmic secrets

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A significant development in thin layer technology could possibly improve the sensitivity of gravitational wave detectors.
Diagram of filament flows from Sagittarius *A, the massive black hole at the center of the Milky Way. Photo: Farhad Yusef-Zada/Northwestern University

Mysterious undertones at the center of the Milky Way

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An international group of astrophysicists discovered something completely new, hidden in the center of the Milky Way galaxy
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 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

First simulation of a wormhole on a quantum computer

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A team of researchers from Harvard University, MIT and Calcutta in collaboration with Google successfully simulated a traversable wormhole with the help of a quantum computer. The experiment performed on Google's quantum processor demonstrated the passage of information in the interlaced system. According to the principle of holography, the physics demonstrated in the experiment is the same as that of particles passing through wormholes. Although it was conducted on only nine qubits, the experiment is of great importance because it illustrates for the first time the possibility of testing quantum gravity with the help of entangled systems.
Black holes collide. Image: depositphotos.com

The most extreme "oscillating black hole" has been discovered - an exotic phenomenon predicted by Einstein's theory of gravity

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Cardiff University researchers have detected a strange twisting motion in the orbits of two colliding black holes, an exotic phenomenon predicted by Einstein's theory of gravity
Researchers have simulated and presented an inexpensive experiment to create and study the early stages of this process in ways previously thought unattainable with current technology. Courtesy of Princeton University

Solving the source of the powerful radio bursts

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The assessment: This is a collision of matter and antimatter in the vicinity of black holes or collapsed neutron stars known as magnetars
black holes Image: depositphotos.com

Stellar "ghost" discovered: Astronomers may have discovered a dark, freely moving "black hole"

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Unlike the supermassive black holes at the centers of galaxies, black holes with the masses of individual stars have no matter attracted to them or other nearby objects surrounding it, so they are difficult to detect
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 slice of our universe
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 photo published this week and what is planned to be done in order to improve the resolution
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 image" 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 by the Ofek Al-Havain partnership which connected eight radio observatories into one radio telescope the size of the Earth
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 "closest 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. After further observations from the ground and from space, both the original researchers and their critics came to the conclusion that there is no black hole
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