Black holes

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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The LIGO facility in Hanford, Washington. Photo: CALTECH

"The winners of the Nobel Prize in Physics were themselves surprised by the strength of the signal of the first gravitational wave event"

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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.

Nobel Prize in Physics for the discovery of gravitational waves

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The Nobel Physics Prize Committee announced this morning the awarding of half of the 2017 Nobel Prize in Physics to Rainer Weiss, and the other half to Barry Barish and Kip Thorne, all three from the LIGO/VIRGO partnership
Artist's rendering of a supermassive black hole tearing apart and swallowing a nearby star. Source: NASA/JPL-Caltech.

How black holes devour stars

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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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A simulation of a supermassive black hole swallowing gas and matter into it. Imaging: NASA/JPL-Caltech.

The disappearing black holes

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Illustration illustrating what two merging black holes look like similar to those detected by LIGO. The black holes rotate misaligned meaning they have different orientations relative to the general motion of the binary orbit. LIGO has found clues that the orbit of at least one black hole in the GW170104 system was previously undetected through its orbital motion before it merged with its partner. Image: LIGO/Caltech/MIT/Aurore Simonnet

A third gravitational wave event has been discovered; Confirms the existence of a new type of black holes

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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.

Black holes, wormholes and the secrets of quantum space-time

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Figure 1: Illustration of the wind blowing from the accretion disk in GRO J1655-40. Credit: NASA/CXC/A.HOBART.

Researchers present a new explanation for the emission of energy and winds from black holes

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The Wirgo gravitational wave detector near Pisa in Italy is supposed to return to operation in the spring of 2017, and thus it is possible that three detectors of this type will operate together, in three different places in the world, for at least a month. Source: The Virgo collaboration.

A new detector will determine the origin of gravitational waves

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What could cause the most powerful flash of light ever observed?

The most powerful flash of light ever observed in space - probably the result of a star "falling" into a black hole

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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 rendering of how the "nearly exposed" supermassive black hole was formed. Credit: Bill Sexton, NRAO/AUI/NSF

Close galactic encounter leaves supermassive black hole 'almost exposed'

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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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Artist's impression of a star being pulled into a black hole and destroyed (left), and the black hole later emitting a "jet" of plasma made up of the debris from the star's destruction. Illustration: Amadeo Bacher, Johns Hopkins University.

For the first time - watching the entire process of a star being swallowed by a black hole until the plasma jets are emitted

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XNUMXD illustration of a wormhole emerging from the black hole

Does time inside black holes move backwards?

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An active galactic nucleus and jets of current coming out of the black hole at its center. NASA / Dana Berry / SkyWorks Digital

A black hole is 30 times larger than the maximum size that would be expected for it based on the mass of the galaxy at its center

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Researchers from the University of Oklahoma and China examined observations from the Hubble Space Telescope and discovered two massive black holes in the quasar Mercarian 231. Photo: Space Telescope Science Facility, Baltimore, Maryland.

For the first time, two huge black holes were discovered in the galaxy, and it is estimated that they will collide

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Prof. Jacob Beckenstein. From Wikipedia

The recipient of the Israel Prize in Physics, Prof. Jacob Bekenstein from the Hebrew University, has passed away

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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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Research that can solve fundamental questions in physics. Prof. Jeff Steinhauer. Photo courtesy of him

Black hole sounds

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The structure of the black hole's environment. Image: University of North Carolina

Physicist from the USA: Black holes cannot exist

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A NASA hot air balloon carrying a telescope for detecting black holes called X-Calibur. Photo: NASA/University of Washington

Searching for black holes from a telescope that will be carried by a giant balloon

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A small black hole accreting mass. Compressed and cold gas (in green) moves towards the center of the star cluster (red X). The stars (in yellow) determine through their gravity the random and unstable trajectory of the black hole through the gas cloud (black line)

The diner at the edge of the universe

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