Scientists speculate that the black hole is pulling in gas from nearby space and this has formed a disc of orbiting material around it. Something like a star or small black hole also orbiting around it, is flying through the disc over and over, causing shockwaves and powerful energy bursts.
Watching these repeated eruptions in real time gives scientists a rare chance to study how black holes behave and learn more about these strange, powerful events. But for now, we still have more questions than answers.
00:02:36 – Universul nostru ar fi într-o gaură neagră? 00:06:52 – Formarea sistemului solar 00:09:33 – Teoria lui Einstein-Cartan 00:14:13 – Ce se întâmplă într-o singularitate a unei găuri negre. 00:20:14 – Teoria inflației Join this channel to get access to perks: https://www.youtube.com/channel/UCYaeaGwjN_VHGrudqi-lKDw/join
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Unii cercetători propun că această direcție preferențială ar putea fi legată de condițiile din momentul Big Bang-ului, când materia ar fi avut deja o direcție de rotație imprimată, similar cu formarea unui sistem solar sau a unui vârtej. Poplawski, un fizician polonez, susține o teorie bazată pe extinderea teoriei relativității generale a lui Einstein, numită teoria Einstein-Cartan. Aceasta introduce conceptul de torsiune a spațiului, care ar explica formarea unui univers nou din interiorul unei găuri negre.
Potrivit acestei teorii, în loc să se formeze o singularitate în centrul găurii negre, ar apărea un portal asemănător unei găuri albe, ceea ce ar da naștere unui nou univers. Poplawski sugerează că universul nostru ar fi fost creat astfel, iar materia din acest nou univers ar proveni dintr-o gaură neagră existentă într-un alt univers. De asemenea, teoria lui sugerează că universul ar trebui să fie euclidian, iar raza universului observabil ar fi similară cu cea a unei găuri negre, având în vedere masa întregului univers.
Aceste idei sunt susținute de calcule care prezic o direcție preferențială de rotație a galaxiilor, iar măsurătorile recente din cadrul telescopului James Webb oferă dovezi care par să sprijine aceste teorii. Această descoperire deschide noi perspective asupra originii și structurii universului nostru.”
Our #Gaia spacecraft has captured a huge dark blob, 800 times more massive than our Sun which seems to be squeezed into a surprisingly small volume of space suggesting it could be an intermediate-mass black hole.
We are Europe’s gateway to space. Our mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out https://www.esa.int/ to get up to speed on everything space related.
Using data from our Gaia mission, astronomers have discovered not only the closest but also the second closest black hole to Earth. The black holes, Gaia BH1 and Gaia BH2, are respectively located just 1560 light-years away from us in the direction of the constellation Ophiuchus and 3800 light-years away in the constellation Centaurus. In galactic terms, these black holes reside in our cosmic backyard.
The two black holes were discovered by studying the movement of their companion stars. A strange ‘wobble’ in the movement of the stars on the sky indicated that they are orbiting a very massive object. In both cases, the objects are approximately ten times more massive than our Sun. Other explanations for these massive companions, like double-star systems, were ruled out since they do not seem to emit any light.
📹 @EuropeanSpaceAgency 📸 ESA/Gaia/DPAC; Creative commons CC BY-SA 3.0 IGO
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We are Europe’s gateway to space. Our mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out https://www.esa.int/ to get up to speed on everything space related.
ESA’s Gaia mission has helped discover a new kind of black hole. The new family already has two members, and both are closer to Earth than any other black hole that we know of.
The two black holes were discovered by studying ultra-precise measurements of stellar positions and motions in Gaia’s third data release.
A strange ‘wobble’ in the movement of two stars on the sky indicated that they are orbiting a very massive object. In both cases, the objects are approximately ten times more massive than our Sun. Other explanations for these massive companions, like double-star systems, were ruled out since they do not seem to emit any light.
Gaia’s second black hole, BH2, is located 3800 light-years away from Earth. It is a binary system consisting of a red giant star and likely a black hole.
In this animation of Gaia BH2, created in Gaia Sky, the orbits are accurately sized, but the back hole diameter is not to scale.
Credit: ESA/Gaia/DPAC
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We are Europe’s gateway to space. Our mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out https://www.esa.int/ to get up to speed on everything space related.
Two teams of astronomers using ESA’s XMM-Newton space telescope have observed repeated outbursts of light from inactive black holes that partially destroy stars again and again. This discovery is unexpected, since outbursts of black holes usually appear only once when a black hole consumes a star.
We are Europe’s gateway to space. Our mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out https://www.esa.int/ to get up to speed on everything space related.
These are termed “tidal disruption events.” But the wording belies the complex, raw violence of a black hole encounter. There is a balance between the black hole’s gravity pulling in star stuff, and radiation blowing material out. In other words, black holes are messy eaters. Astronomers are using Hubble to find out the details of what happens when a wayward star plunges into the gravitational abyss.
We are Europe’s gateway to space. Our mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out https://www.esa.int/ to get up to speed on everything space related.
ESA’s XMM-Newton has X-rayed this beautiful cosmic creature, known as the Manatee Nebula, pinning down the location of unusual particle acceleration in its ‘head’.
The Manatee Nebula, or W50, is thought to be a large supernova remnant created when a giant star exploded around 30 000 years ago, flinging its shells of gases out across the sky. It is one of the largest such features known, spanning the equivalent size of four full Moons.
Unusually for a supernova remnant, a black hole remains in its core. This central ‘microquasar’, known as SS 433, emits powerful jets of particles travelling at speeds close to a quarter the speed of light that punch through the gassy shells, creating the double-lobed shape.
SS 433 is identified by the red dot in the middle of the image. The X-ray data acquired by XMM-Newton are represented in yellow (soft X-rays), magenta (medium energy X-rays) and cyan (hard X-ray emission), while red is radio and green optical wavelengths imaged by the Very Large Array and the Skinakas Observatory in Greece, respectively. @NASA NuSTAR and Chandra data were also used for the study (not shown in this image).
The nebula attracted attention in 2018 when the High-Altitude Water Cherenkov Observatory, which is sensitive to very high energy gamma-ray photons, revealed the presence of highly energetic particles (hundreds of tera electron volts), but could not pinpoint from where within the Manatee the particles were originating.
XMM-Newton was crucial in homing in on the region of particle acceleration in the X-ray jet blasting from the Manatee’s head, which begins about 100 light years away from the microquasar (represented by the magneta and cyan colours towards the left side SS 433) and extends to approximately 300 light years (coinciding with the radio ‘ear’ where the shock terminates).
Samar Safi-Harb of the University of Manitoba, Canada, who led the study, says “thanks to the new XMM-Newton data, supplemented with NuSTAR and Chandra data, we believe the particles are getting accelerated to very high energies in the head of the Manatee through an unusually energetic particle acceleration process. The black hole outflow likely made its way there and has been re-energized to high-energy radiation at that location, perhaps due to shock waves in the expanding gas clouds and enhanced magnetic fields.”
The nebula acts as a nearby laboratory for exploring a wide range of astrophysical phenomena associated with the outflows of many galactic and extragalactic sources and will be subject to further investigation. Furthermore, follow-up studies by ESA’s future Athena X-ray observatory will provide even more sensitive details about the inner workings of this curious cosmic Manatee.
Credits: S. Safi-Harb et al (2022)
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What would the outcome be if you took a leap of faith straight into a black hole? We looked to Einstein and Hawking to ponder the scenario.
Say one day you were exploring space looking for a new planet for humans to inhabit, but came across a black hole and decided – why not check it out? Would you have any chance of survival? How would you get out if at all? Would you find a shortcut to another universe? Watch the video to learn about what would happen if you fell into a black hole.
About What If: Produced by Underknown in Toronto, Canada, What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure — grounded in scientific theory — through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.
A new supercomputer model could help astronomers find spiraling, merging systems of two supermassive black holes. These mergers happen often in the universe, but are hard to see. Watch as the simulation reveals the merger’s brighter, more variable X-rays. https://go.nasa.gov/2OsaMAs
Credit: NASA’s Goddard Space Flight Center
Music: “Games Show Sphere 01” from Killer Tracks
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Are wormholes real or are they just magic disguised as physics and maths? And if they are real how do they work and where can we find them?
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What if the Earth were swallowed by a black hole? Would humanity’s legacy be gone forever? Or could you somehow get back that information from behind the event horizon?
There are three possible answers to this question…but they all break physics as we know it!
Have you ever wondered what it would be like to fall into a black hole? Take a 360° adventure to find out!
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NOVA has teamed up with Cook’s Illustrated to cook up a recipe for stars and black holes – a culinary “course” on how the most mysterious objects in the universe are created.
Vice President Mike Pence called for renewed U.S. leadership in space during the first meeting of the National Space Council – outlining exploration goals that include returning American astronauts to the Moon, to build the foundation needed to send Americans to Mars and beyond. The October 5 council meeting, held at the Smithsonian National Air and Space Museum’s Steven F. Udvar-Hazy Center, outside Washington, brought together representatives from all aspects and sectors of the national space enterprise, for the first time in a quarter century – including NASA’s Acting Administrator, Robert Lightfoot. Also, U.S. Spacewalk aboard the Space Station, Eugene Parker Views Solar Probe Spacecraft, Scientists Find Giant Black Hole Pairs, and Parachute Test Platform Launched!
Scientific notes:
Stellar mass black holes vs. supermassive black holes
* Stellar mass black holes form from the collapse of massive stars at the ends of their lives, so they have roughly the same mass as a star. Supermassive black holes are physically identical to their smaller counterparts, except they are 10 thousand to a billion times the size of the sun. However, their formation is more of a mystery. They may form from the merging of smaller black holes. http://astronomy.swin.edu.au/cosmos/S/Supermassive+Black+Hole
Supermassive black holes at the center of galaxies
* Almost every large galaxy has a supermassive black hole at its center, but researchers are not yet sure (https://jila.colorado.edu/research/astrophysics/black-holes-galaxies) why that’s the case, how they originate, and what their role is in the creation and evolution of galaxies.
Why are stars different colors?
* The color of a star depends on its temperature (http://www.atnf.csiro.au/outreach/education/senior/astrophysics/photometry_colour.html). The hotter a star, the higher energy its light will be. Higher energy/temperature corresponds with the blue end of the visible spectrum and lower energy/temperature corresponds with the red end.
How does dark matter make stars spin faster?
* In the 1960s, astronomers Vera Rubin and Kent Ford noticed that stars at the edges of galaxies were moving just as fast as stars at the center, which surprised them: it appeared that the force of gravity causing stars to orbit the center of the galaxy was not weakening over distance. Their observation implied that something else, distributed throughout the galaxy, was exerting a gravitation pull. We now know that that “something else,” now named dark matter, accounts for about 85% of the matter in the universe. (It existence was inferred in the 1930s, when the astronomer Fritz Zwicky(http://www2.astro.psu.edu/users/rbc/a1/week_10.html) noticed that galaxies in clusters were moving faster than they should.)
Size of the universe
* The universe is only 13.8 billion years old, but has a radius of about 46 billion light-years. If nothing can travel faster than the speed of light, how can that be? The expansion of the universe, driven by dark energy, is causing distances between objects to grow. Note that it is not moving those objects apart; rather, it is increasing the amount of space between them. https://phys.org/news/2015-10-big-universe.html
Cosmic webs
* Galaxies are not distributed randomly (http://skyserver.sdss.org/dr1/en/astro/structures/structures.asp) in space; instead, clusters of galaxies form web-like patterns. These webs consist of filaments, where dark matter and ordinary (baryonic) matter are concentrated, and voids, where galaxies are scarce. Researchers believe that these large-scale structures grew out of minor fluctuations in density at the beginning of the universe.
Composition of the early universe
* Moments after the Big Bang, the universe formed the nuclei for what would be come the universe’s hydrogen and helium atoms, with one helium nucleus for every 10 or 11 hydrogen (http://umich.edu/~gs265/bigbang.htm). When the first stars formed, there were no heavier elements — those elements formed inside stars.
String Theory Landscape
* The String Theory Landscape is a theory that the universe we live in is one of many universes. It attempts to explain how certain constants of nature seem “fine-tuned” for life, which contradicts the anthropic principle, or the notion that we humans hold a special place in the universe. https://www.scientificamerican.com/article/multiverse-the-case-for-parallel-universe/%0A
Disintegration of the universe
* In the future Degenerate Era of the universe, as space-time expands and stars burn up, all of the matter in stars will be consumed by black holes. But even black holes are not forever. Stephen Hawking theorized that black holes will slowly radiate away their mass in what is now called Hawking radiation until they too dissipate away. http://www.nytimes.com/books/first/a/adams-universe.html
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MEDIA CREDITS:
Music provided by APM
Sound effects: Freesound.org
Additional Animations:
– Galaxy within Universe: Edgeworx;
– Stars at center of Milky Way – NASA/NCSA University of Illinois Visualization by Frank Summers, Space Telescope Science Institute, Simulation by Martin White and Lars Hernquist, Harvard University
Space Shuttle “Endeavour” was launched to space at 14:56 CEST (12:56 GMT) on 16 May from Kennedy Space Center in Florida.
The 16-day-long STS-134 mission will deliver AMS-02, a big cosmological instrument to the Space Station and its crew includes ESA’s Italian astronaut Roberto Vittori. This is the last flight of “Endeavour”.
