The eerie sound waves sent out by a Black Hole
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By SpaceObserver
I found it intriguing to hear Avi Loeb's insights on the recent discovery of radio waves from another planetary system. During his appearance on 'Jesse Weber Live,' Loeb explained that researchers have detected these signals, marking the first time we've pinpointed such emissions from a world beyond our solar system. It's fascinating how advances in technology allow us to collect data from distant exoplanets that were previously unreachable.
Loeb clarified that while the presence of radio waves is exciting, it's important to note that these signals do not indicate extraterrestrial intelligence. Instead, they are a product of natural processes occurring on the planet. This distinction is crucial, as many discussions around alien life often conflate signals from distant worlds with the possibility of communication from intelligent beings.
The concept of detecting radio waves from exoplanets is not entirely new, but Loeb's comments underscore the significance of this particular finding. It highlights how our understanding of exoplanets is evolving. For instance, previous missions like Kepler and TESS have identified thousands of potential planets, but this discovery moves us towards understanding their physical properties and atmospheric conditions.
Moreover, Loeb emphasized the need for caution when interpreting these findings. The radio waves could stem from various sources, including the planet’s geology or atmosphere, rather than signs of life. This raises important questions about the methods we use to analyze and validate these signals. Are we adequately equipped to differentiate between natural phenomena and genuine markers of life?
As technology advances, the potential for future discoveries grows. Upcoming missions such as the James Webb Space Telescope (JWST) will allow astronomers to delve deeper into the atmospheres of exoplanets, searching for chemical signatures that might indicate habitability. This is an exciting time for astrophysics, as we uncover more about our universe and the various worlds that exist within it.
With this latest revelation, it might be worth considering: how should we approach the interpretation of radio signals from exoplanets, given their natural origins? What criteria should scientists use to distinguish between signals that warrant further investigation versus those that can be attributed to natural astrophysical processes?
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By SpaceObserver
I just came across a fascinating video from NewsNation that compiles some recent UFO disclosure claims, including notable whistleblower testimonies and reports of black triangle sightings. One of the highlights discusses a piece of metal said to have been recovered by the Soviet Union, which has sparked quite a bit of debate on its origin and significance.
The video presents several allegations from whistleblowers who claim to have inside knowledge about government investigations into UFOs. These testimonies often touch on the mysterious nature of black triangle sightings, which have been reported by both military personnel and civilians alike. Black triangles are often described as large, silent craft that glide through the sky, and they have been a topic of intrigue for decades. The claims surrounding them are often met with skepticism, yet they continue to draw attention, especially in light of recent government hearings.
Another intriguing aspect mentioned in the video is the latest UFO file release, which is part of an ongoing effort by the government to be more transparent about its investigations. This aligns with the recent push for greater accountability within government agencies regarding UAP (Unidentified Aerial Phenomena) sightings and encounters. Many hope that as more information becomes available, it will help clarify some of the uncertainties surrounding these phenomena.
The disputed metal piece from the Soviet era adds another layer of complexity. If indeed it has ties to extraterrestrial technology, it could potentially change our understanding of both history and current UAP phenomena. However, the lack of verifiable evidence surrounding this claim raises important questions about its authenticity and the motivations behind its disclosure. It seems like the more we dig, the more questions arise rather than answers.
Overall, the video encourages viewers to consider the implications of these claims and the broader context of government transparency regarding UFOs. As someone interested in both space exploration and the potential for extraterrestrial life, I find the intersection of scientific inquiry and government investigation particularly compelling. It’s a reminder that while we seek answers about life beyond Earth, there are still many unresolved mysteries within our own skies.
What do you think the government should focus on next regarding UAP investigations and disclosures? Are we ready for full transparency, or is there still too much at stake?
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By CosmicSignals
I recently came across a fascinating YouTube video titled 'UFO files: ‘Black triangles’ a highlight of latest release.' This video dives into some of the most compelling black triangle sightings documented in official files, and it reminds me of the infamous Phoenix Lights incident back in 1997, which also left many witnesses baffled by the sight of a massive, triangular craft silently gliding through the night sky. The black triangle phenomenon has been a topic of intrigue not only for UFO enthusiasts but also for those interested in the technological capabilities of potential extraterrestrial civilizations.
The video reviews several recent disclosures, particularly emphasizing military encounters with these mysterious black triangles. The accounts of pilots describing their encounters with these crafts are particularly striking. They often report high-speed maneuvers and capabilities far beyond our known aviation technology. What stands out in this video is the presentation of radar data that seems to corroborate these eyewitness reports. Such data is crucial in validating the existence of these phenomena and could provide evidence of advanced technology not yet publicly understood, igniting discussions about what kind of civilization could potentially operate such vehicles.
One claim that piqued my interest was the reference to the craft's silent operation, which has been a consistent detail in many of these sightings. The ability to move without producing sound poses intriguing questions about the propulsion systems that might be in use. This leads to a larger question of whether these technologies could be a product of extraterrestrial engineering or simply advanced human technology that is still classified. The video encourages viewers to consider the implications of these technologies on our understanding of physics and the potential for interstellar travel.
As someone deeply interested in SETI and the search for extraterrestrial intelligence, I find it crucial to explore the scientific possibilities that these sightings represent. If we are indeed witnessing advanced craft, what might this imply about the existence of other life forms in the universe? Could we be on the brink of understanding not just the technology behind these crafts, but also the civilizations that created them? The video leaves us pondering if we are approaching a pivotal moment in our search for biosignatures and technosignatures in the cosmos, and whether these sightings could be a precursor to more profound revelations.
I'm curious to hear what everyone thinks about the implications of these recent disclosures. How do you interpret the black triangle sightings in the context of our ongoing search for extraterrestrial life? Do you believe these encounters suggest we are not alone in the universe? Let’s discuss the potential scientific breakthroughs and the mysteries that remain unsolved as we examine the evidence presented in the video.
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By Avi Loeb Medium
A Tale of Three Gas Clouds Orbiting the Supermassive Black Hole at the Center of the Milky-Way Galaxy
A possible explanation for the detection of a compact gas cloud around the supermassive black hole (SMBH) at the center of the Milky-Way galaxy, involves a proto-planetary system which is disrupted by gravitational tide from the black hole. (Image credit: R. Murray-Clay and A. Loeb 2012)The black hole at the center of our Milky-Way galaxy, Sagittarius A*, is 4 million times more massive than the Sun. It is continuously being fed by gas, including a handful of gas clumps with masses on the order of a few Earth masses in its immediate vicinity. One of these compact gas clouds, labeled G2 has an extreme orbit which passes withing 100 times the Earth-Sun separation from the black hole. It dissipated some of its orbital energy via drag accretion flow around Sagittarius A*. Thirteen years prior to G2, a similar gas cloud, called G1, passed Sagittarius A* on a similar orbit.
The origin of G2 is unknown. In 2014, I published a paper in collaboration with Ruth Murray-Clay (accessible here), where we suggested that G2 can naturally be produced by a proto-planetary disc surrounding a star, which was scattered from the observed ring of young stars orbiting Sagittarius A*. As the young star approaches the black hole, its disc experiences both photoevaporation and tidal disruption, producing a cloud. Our model implied that planets form in the Milky-Way center, and that tidal debris from proto-planetary discs can flag stars, which are otherwise too faint to be detected.
A new paper (accessible here) reports about the orbit of a third gas clump moving along nearly the same orbits as G1 and G2. Since the probability of finding three stars on such similar orbits is very low, the authors argue against stellar-based source models. Instead, they suggest that the trio of clouds: G1, G2 and G3, originated from the stellar wind of the massive binary star IRS 16SW.
The main argument of the new paper is that the likelihood of having three stars on similar orbits as the origin of the G1, G2 and G3 system is low. However, they miss the point that stars often form in groups and most massive stars are born in triples (as reported in another recent paper here). The main challenge of the starless scenario proposed by the authors is in making compact dense clouds out of the interaction of a diffuse wind with a diffuse ambient medium. Given the high velocities of stars and gas in the Galactic center, it is rather challenging to account for the formation of dense and compact gas clumps with the specific properties of G1, G2 and G3. A simpler explanation might be that a triple star system was tidally disrupted by the black hole and we are witnessing the clouds of gas around each of them.
Just as in human relationships, three-body systems are often chaotic and unstable. However, it is possible that the gravitational intervention of the supermassive black hole Sagittarius A* separated the triple system of stars shortly after formation. In that case we the three gas clouds G1, G2 and G3 flag the separated system of stars in this tumultuous environment.
ABOUT THE AUTHOR
(Image Credit: Chris Michel, National Academy of Sciences, 2023)Avi Loeb is the head of the Galileo Project, founding director of Harvard University’s — Black Hole Initiative, director of the Institute for Theory and Computation at the Harvard-Smithsonian Center for Astrophysics, and the former chair of the astronomy department at Harvard University (2011–2020). He is a former member of the President’s Council of Advisors on Science and Technology and a former chair of the Board on Physics and Astronomy of the National Academies. He is the bestselling author of “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth” and a co-author of the textbook “Life in the Cosmos”, both published in 2021. The paperback edition of his new book, titled “Interstellar”, was published in August 2024.
Professional website:
https://lweb.cfa.harvard.edu/~loeb/
Social media:
https://avi-loeb.medium.com/
https://www.youtube.com/@ProfessorAviLoeb
https://open.spotify.com/show/1zhndXkvSY2b8FdjspFpCd
https://x.com/ProfAviLoeb
View the full article
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By Avi Loeb Medium
An artist’s illustration of the collision of the protoplanet Theia with Earth (left) that led to the formation of the Moon. (Image credit: Hernán Cañellas)A giant impact of a Mars-size proto-planet named Theia with proto-Earth, 4.5 billion years ago, may have ejected debris that coalesced to form our Moon. Computer simulations support this giant impact hypothesis, as discussed here.
Could a moon form through a similar process when two neutron stars collide?
Dense star clusters, known as globular clusters, contain of order a million stars and are known to have stellar remnants segregated near their centers. These remnants include stellar-mass black holes and neutron stars. They are typically more massive than the background stars and hence settle towards the cluster center through a gravitational segregation process resembling the separation of heavy dust particles from air molecules under the influence of the Earth’s gravity. Near the cluster center these remnants find each other, creating pairs of black holes that coalesce through the emission of gravitational waves. This natural process could explain the origin of many of the gravitational wave sources detected by the LIGO-Virgo-KAGRA (LVK) collaboration over the past decade, as originally proposed here.
The cores of globular clusters are known to contain an abundant population of neutron stars which appear as pulsars or X-ray sources with a mass of up to twice the mass of the Sun (as discussed recently here). These neutron stars, remnants from core collapse of massive stars, have a mass density of an atomic nucleus and a characteristic size of a city, about 12 kilometers (as discussed here).
The dense core of a globular cluster can lead to the formation of pairs of black holes or neutron stars but also to three-body systems that are dynamically unstable, and can result in a head-on collision between two neutron stars under rare circumstances (as discussed here).
When two neutron stars collide head-on, their merger is expected to lead to a black hole carrying most of their combined masses. However, just as in the collision between Thea and Earth, a fraction of the mass might be ejected as debris that coalesces to form a moon made of neutron star matter.
Equilibrium configurations of stable neutron stars exist down to 0.09 of the mass of the Sun (as discussed here). Therefore, the debris from a head-on collision between two neutron stars could potentially lead to the formation of a central black hole or neutron star accompanied by a low-mass neutron-star moon. As a result of the emission of gravitational waves, the moon will ultimately merge with the central object. The lifetime of the system depends on the initial separation of the moon from the central object as well as their masses. An alternative channel for creating a black hole moon is from the core collapse of a single progenitor star to a black hole and a debris disk that coalesces into a neutron star moon, as discussed here.
On November 12, 2025, the LVK collaboration reported the detection of a gravitational wave signal from a compact merger candidate named S251112cm (as reported here). This event is statistically compelling due to its relatively low False Alarm Rate, estimated at about 1 per 6.2 years (as noted here). The source luminosity distance is estimated to be in the local Universe, measuring about 300 million light years (93 ± 27 Mpc), but a search for an electromagnetic counterpart did not yield a detection (as reported here). The analysis of the gravitational wave signal implies that the source chirp mass falls predominantly in the range of 0.1 to 0.87 solar masses, implying a sub-solar mass object at the 99% confidence. The more massive object could be in the range of 1–3.5 solar masses, based on Figure 1 here. The inference of a low-mass object raises the possibility that S251112cm may have been produced by the coalescence of a neutron star moon and an order of magnitude more massive companion in the form of a black hole or a neutron star.
Our own Moon might also crash back on Earth. This would not be the result of gravitational wave emission but rather its drag on the envelope of the Sun once it expands as a red giant to engulf the Earth-Moon system (as discussed here).
Some moons are doomed to crash back on their birth place, just like adults settling back to their childhood home.
ABOUT THE AUTHOR
(Image Credit: Chris Michel, National Academy of Sciences, 2023)Avi Loeb is the head of the Galileo Project, founding director of Harvard University’s — Black Hole Initiative, director of the Institute for Theory and Computation at the Harvard-Smithsonian Center for Astrophysics, and the former chair of the astronomy department at Harvard University (2011–2020). He is a former member of the President’s Council of Advisors on Science and Technology and a former chair of the Board on Physics and Astronomy of the National Academies. He is the bestselling author of “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth” and a co-author of the textbook “Life in the Cosmos”, both published in 2021. The paperback edition of his new book, titled “Interstellar”, was published in August 2024.
Professional website:
https://lweb.cfa.harvard.edu/~loeb/
Social media:
https://avi-loeb.medium.com/
https://www.youtube.com/@ProfessorAviLoeb
https://open.spotify.com/show/1zhndXkvSY2b8FdjspFpCd
https://x.com/ProfAviLoeb
View the full article
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