Black holes

This Hubble image captures the stunning remains of an exploded star in the distant galaxy LEDA 132905, located more than 400 million light-years away. Credit: ESA/Hubble & NASA, RJ Foley (UC Santa Cruz)

Hubble captures the dramatic end of a distant supernova

  • No comments
The Hubble Space Telescope has documented the remnants of the supernova SN 2022abvt in the distant galaxy LEDA 132905, more than 400 million light-years from Earth.
A Dyson ball designed to block the sun and use all its energy. Illustration: depositphotos.com

Could black holes be a source of energy for aliens? New research reveals fascinating possibilities

  • 5 תגובות
Scientists propose a new way to search for advanced civilizations: detecting energy signatures of structures around black holes, which may be visible up to 17,000 light-years away
Schematic overview of a wide orbiting binary system within the Milky Way. As it moves through the galaxy, the ellipticity of its orbit changes due to the gravitational influence of the galaxy and encounters with nearby stars, leading to close encounters (small image). Credit: Jakob Stegmann et al 2024 ApJL 972 L19

The role of galactic gravity in black hole collisions: a groundbreaking study

  • No comments
New research shows how the host galaxy's gravity affects distant pairs of stars, bringing the black holes into extreme and rare collisions accompanied by powerful gravitational waves
New findings in Omega Centauri indicate many stellar black holes instead of one medium-sized black hole, based on analysis of pulsar data. credit: University of Surrey

Has the mystery been solved? Hidden black hole cluster discovered in Omega Centauri

  • One response
The black hole of our Milky Way as seen in polarized light. Astronomers have for the first time been able to measure polarity, a hallmark of magnetic fields, so close to the rim of Sagittarius A*. The lines added to the image indicate the direction of polarization, which is related to the magnetic field around the shadow of the black hole. Credit: EHT Collaboration

Strong magnetic fields surround the Milky Way's central black hole

  • No comments
The antenna galaxies are in the process of collisions. Credit: NASA

How cosmic collisions created the largest galaxies in the universe

  • No comments
The study suggests that these galaxies were formed from large flows of cold gas and collisions between galaxies in the early universe, which led to the formation of stars at an extremely fast rate
A magnificent black hole with an allocation disk and a cosmic hill of matter.

Supermassive black holes defy physics to become cosmic giants

  • 2 תגובות
Researchers have linked X-ray emissions from 21 distant quasars to the rapid growth of supermassive black holes in the early universe
The internal dynamics of a black hole. The image was prepared using DALEE and is not a scientific image

A black hole with hidden instability: Theories of spacetime may be rewritten

  • One response
New research reveals an accumulation of energy inside black holes, which could undermine traditional models and change our understanding of these cosmic structures
A black hole with its bright event horizon. Illustration: depositphotos.com

Black holes send signals - a breakthrough method by astrophysicists to decipher them

  • No comments
Astrophysicists have developed a method for detecting echoes of light from black holes that will allow measuring their mass and rotation
This figure shows a stage in the merger of two galaxies that creates a single galaxy with two supermassive black holes at the center and surrounded by disks of hot gas. The black holes orbit each other for hundreds of millions of years as they merge to form a single supermassive black hole that sends out powerful gravitational waves. Credit: NASA/CXC/A.Hobart

Gravitational waves hint that the universe still has secrets

  • One response
New research sheds light on the origin of low-frequency ripples in space-time
Web image showing the quasar J0148 circled in red. The upper small image shows the central black hole and the lower the stellar emission from the host galaxy.

How did black holes get so big and so fast? The answer lies in dark matter

  • No comments
The 25 most interesting images taken by the Chandra Space Telescope in its 25 years so far. Credit: NASA/SAO/CXC

NASA's Chandra X-ray Observatory Celebrates 25 Years With Impressive Cosmic Images

  • No comments
Since its launch in 1999, Chandra has helped unravel cosmic mysteries, supported the research of thousands of astronomers, and maintained its status as a cornerstone of astrophysical research.
Prof. Martin Rees, winner of the 2024 Wolf Prize in Physics. Photo courtesy of the Wolf Prize Foundation

The British Astronomer Royal won the Wolff Prize in Physics

  • No comments
The Wolf Prize in Physics for 2024 is awarded to Professor Martin Rees of the University of Cambridge, England, for his "pioneering contributions to high-energy astrophysics, the formation of galaxies and structures in the universe, and cosmology"
The black holes orbiting each other. Both black holes have jets associated with them: the larger one in red, the smaller one in yellow. Normally only the red jet is visible, but in the 12 hours on November 12, 2021 the small jet was dominant, giving a direct signal from the smaller black hole, and was observed for the first time. Credit: NASA/JPL-Caltech/R. Hurt (IPAC) & M. Mugrauer (AIU Jena)

NASA's Planet Hunter's Rare Look at Two Black Holes in a Distant Galaxy

  • One response
Two black holes orbit each other but usually only see the jet of one of them A rare observation made it possible to see the other as well and provide new insights
A soon-to-be-launched novel space telescope may reveal a new type of "featherweight" black hole that will challenge existing theories of black hole formation. Credit: NASA's Goddard Space Flight Center

Echoes of the Big Bang: The Roman Space Telescope's Search for Black Holes with Masses of approx

  • No comments
A soon-to-be-launched novel space telescope may reveal a new type of "featherweight" black hole that will challenge existing theories of black hole formation
The early universe immediately after the big bang, with a chaotic background of energy and particles. Small, dense black holes, some the size of an atom, are scattered throughout the image. These black holes are described with a "color charge" aura, symbolizing the unique property of quarks and gluons. Around the black holes is a cosmic landscape of quark-gluon plasma, with hints of the beginnings of proton and neutron formation. The image was prepared using DALEE and is not a scientific image

Exotic black holes may be a byproduct of dark matter

  • One response
Fifty years ago, physicist Stephen Hawking proposed that dark matter might be a population of black holes, which may have formed shortly after the Big Bang. They also existed for a short time but had an impact on
A star cluster forms in a giant molecular cloud as reproduced by the simulation in the model. The picture is based on the model. The blue dots represent individual stars. Dark and light colors indicate the temperature of the gas (cold and hot). Visualization by Takaki Takeda (VASA ENTERTAINMENT INC.)

"Medium and powerful: medium-mass black holes can survive in globular clusters"

  • No comments
First-ever model simulations of individual stars in a star cluster in the process of formation suggest possible mechanisms for the formation of intermediate-mass black holes
This groundbreaking idea proposed by Prof. Liu's team allows a single astronomical telescope in the Earth's magnetosphere to function as a gravitational wave signal detector. Credit: HKUST

Astrophysicists harness planetary power to explore the universe's greatest mysteries

  • One response
Observing the universe using gravitational waves poses significant technological challenges, especially in the investigation of the frequency range above one kilohertz, the astronomers are technologically assisted in the magnetosphere of planets to detect the gravitational waves
The black hole's accretion disk. Illustration: depositphotos.com

How a black hole grows

Researchers have developed a method for mapping the central regions around black holes, which contributes to a better understanding of their growth
A black hole pulls matter into it, the possibilities are that the matter will be ejected back into space or fall into the event horizon. Illustration: depositphotos.com

Beyond the threshold: a new visualization of a black hole at NASA allows viewers to dive into the event horizon

  • One response
A NASA astrophysicist has developed immersive simulations of a black hole using a supercomputer. These visuals illustrate two scenarios: a last-minute escape or crossing the event horizon and falling into the black hole
The coalescence and merger of a black hole from the bottom of the mass gap (surface in dark gray) with a neutron star with colors ranging from dark blue (60 g/cm600) to white (XNUMX kg/cmXNUMX) emphasize the strong deformations of the low-density material of the neutron star Credit: I. Markin (Potsdam University), T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics), H. Pfeiffer, A. Buonanno (Max Planck Institute for Gravitational Physics)

Gravitational waves reveal hidden interactions in space

  • 3 תגובות
The analysis of the signal GW230529 picked up by LIGO shows that it originated from the merger of two compact objects, one with a mass between 1.2 and 2.0 times that of the Sun and the other with a mass slightly more than twice the first
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

  • 2 תגובות
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
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

  • 10 תגובות
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
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

  • 2 תגובות
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

  • No comments
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

  • 7 תגובות
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

  • No comments
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

  • No comments
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

  • No comments
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

  • 2 תגובות
"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

  • No comments
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

  • 7 תגובות
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

  • 15 תגובות
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

  • One response
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

  • One response
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

  • 2 תגובות
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

  • 2 תגובות
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

  • 5 תגובות
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'

  • 4 תגובות
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"

  • 8 תגובות
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

  • 7 תגובות
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

  • One response
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?

  • No comments
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

  • 2 תגובות
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?

  • 9 תגובות
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"

  • 5 תגובות
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?

  • 9 תגובות
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

  • One response
Science website logo
SEARCH