in the media landscape of recent years and despite the enigmas that still surround them and that touch on very profound questions of theoretical physics, they are commonly considered in astrophysics and in . We even studied their They propagate at the speed of light transporting energy. We can compare them…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/f/4/c/f4c81d66a7_86131_ligo-fusion-trou-noir-ligo-nsf-aurore -simonnet .jpg” data-url=”https://news.google.com/sciences/definitions/physics-gravitational-wave-4003/” data-more=”Read more”> due to collisions with others Here is a list of celestial objects that can be called celestial bodies (not…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal / 6/c /c/6cc6562b02_127395_astre-c-esa-hubble-nasa.jpg” data-url=”https://news.google.com/sciences/definitions/etoile-astre-851/” data-more=” Read Next”> relativistic deals. Recently, which is the very definition of a black hole when it is a closed surface.
but its presence is doubted in certain corners of the Earth, only a cross section can be observed…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/ midioriginal/7/ 7/7/777b761907_120668_voie-lactee-galaxie.jpg” data-url=”https://news.google.com/sciences/definitions/universe-voie-lactee-3729/” data-more=”Read more”> and the they are increasingly difficult to justify. What with the beginning of the 1960s when only a handful of visionaries, such as took these solutions from However, it also brings a new conception of space and time, in which gravitation becomes a geometric property of…” data-url=”https://news.google.com/sciences/definitions/ physics -relativity-general- 3572/” data-more=”Read more”> seriously even No.
However, the first candidates for the title of black holes were eliminated during the 1970s, in the form of
The result of this…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/f/6/7/f678fd3677_50035322_eboulement-cmic-blog-cc-nc-2.jpg ” data-url=”https://news.google.com/planet/definitions/sustainable-development-landfall-6515/” data-more=”Read More”> gravity of a probably at least 30 solar rays, was also a powerful source of X-rays by increasing organic matter, nitrogenous matter, etc.
There are different families like:
organic matter, which constitutes living beings (animals or plants) or…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/e/7/0/e70ccaaf4a_91935_matiere. jpg” data-url=”https://news.google.com/sciences/definitions/matiere-matiere-15841/” data-more=”Read more”>of its companion star.
This matter, spiraling towards the black hole, actually forms a compact disk where the forces of viscous friction between the spirals ofadjacent areas give off heat. Physicists refer to heat as thermal energy. In the international system, therefore, it is measured in joules (J). Heat corresponds more precisely to a transfer…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/3/5/735709801b_92578_chaleur.jpg” data-url=” https ://news.google.com/sciences/definitions/physics-heat-15898/” data-more=”Read more”> to the point of producing a glowing hot plasma in the X-ray range.
Black holes are among the most opaque objects in the Universe. Fortunately, however, they are among the most attractive, and it is because of their excessive power of attraction that we can detect them. Giant black holes are the most monstrous ogres in the cosmic zoo, but they are not weapons of mass destruction. The jets of matter they produce would have helped ignite the first stars and form the first galaxies. Hubert Reeves and Jean-Pierre Luminet, specialists in contemporary cosmology, answer all your questions. For more information, visit the site. © ECP Group, YouTube
However, we know that most stars form binary systems, so we should expect there to be a certain number of these.in the Milky Way. However, it is also possible that the distance between a stellar black hole and its companion star is such that no appreciable transfer of material occurs. So there is no disk and no X-ray emission, too, for example because the star has not yet become a that has expanded to the point of overflowing what is called its Roche lobe, named after the mathematician and 19th century frenchme century.
The first peak to emerge from a population of dormant black holes
This type of stellar black hole is said to be ”and so far none have been detected. That has just changed thanks to an international team of astronomers who used the Flames instrument for their discovery (Fiber Large Array Multi-element Spectrograph) in In 1993, ESO launched the VLT (Very Large Telescope) project and decided to install it at the Cerro Paranal site in the Chilean Andes, where the climate is particularly favorable for astronomical observations. It is…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/f/0/7/f073110cb2_50034377_vlt.jpg” data-url=”https://news.google .com/sciences/definitions/universe-vlt-2147/” data-more=”Read more”> of’ As the researchers explain in an article published in .
To do this, they had to turn the VLT’s gaze towards theof the Tarantula located in the , a neighboring galaxy to ours. Six years of observations took the team led by Tomer Shenar, who began this research at KU Leuven in Belgium and is now a Marie-Curie Fellow at the University of Amsterdam in the Netherlands.
The candidate for the title of sleeping black hole has been named VFTS 243. It contains at least nine times the mass of our own. The Sun is the closest star to Earth, from which it is approximately 150 million kilometers away. The Sun is 8.5 kparsecs from the center of the Milky Way. In stellar classification, the sun is a G2-type star.
The mass…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/1/d/9/1d9cd1d45f_50034577_eruption.jpg” data-url=”https://news. google.com/sciences/definitions/univers-soleil-3727/” data-more=”Read more”> and revolves around a hot blue star that weighs 25 times the mass of the Sun. Surprisingly, it is not accompanied by perceptible traces of the remains of an explosion of Excerpt from…” data-image=”https://cdn.futura -sciences.com/buildsv6/images/midioriginal/a/9/4 /a940132305_50034136_supernova1987a.jpg” data-url=”https://news.google.com/sciences/definitions/universe-supernova-60/” data-more =”Read more”> (more precisely ME’ almost circularand the kinematics of VFTS 243 imply that the collapse of the parent star into athe black hole was associated with little or no ejected matter) suggesting that, as previously thought, a gravitationally collapsing star can sometimes directly become a black hole without going through the supernova stage.
” The star that formed the black hole of VFTS 243 appears to have completely collapsed, with no signs of an earlier explosion.explains Tomer Shenar in an ESO statement in which he adds, Evidence for this “direct collapse” scenario has only recently emerged, but our study provides possibly one of the most direct indications. This has huge implications for the origin of the melting point of water, in other words, the temperature at which ice melts…” data-image=”https://cdn.futura-sciences .com/buildsv6/ images/midioriginal/ 7/d/0/7d0df59f3c_82086_fusion.jpg” data-url=”https://news.google.com/sciences/definitions/physics-fusion-15305/” data-more=” Read more”>black holes in the cosmos. »
For a fairly accurate French translation, click on the white rectangle at the bottom right. Then the English subtitles should appear. Then click on the nut to the right of the rectangle, then on “Subtitles” and finally on “Auto translate”. Choose “French”. © European Southern Observatory (IT’S)
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