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Black holes

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. Asaf 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, a relatively long time after the destruction of the star. The research even proves the power of the event and the partial understanding of the scientific world on the subject. The research was published in Nature Astronomy

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 - the 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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