GPS Mapping of the Spacetime Around a Black Hole
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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 CosmicSignals
The more I read about Enceladus, the more I find it puzzling that we aren't talking about it more when it comes to the search for extraterrestrial life. The fact that this moon has liquid water beneath its icy surface is such a compelling lead for astrobiologists. Water is a fundamental ingredient for life as we know it, yet discussions often overlook this fascinating world while focusing on Mars or Europa.
The plumes of water vapor that erupt from Enceladus’ south pole are also intriguing. They contain organic molecules that could serve as building blocks for life. It makes me wonder whether we should be prioritizing missions to study these plumes more closely. Could we find biosignatures or even microbial life in those ejecta?
I’ve read that some scientists believe the ocean beneath Enceladus’ ice could be in contact with a rocky seafloor, which would provide the necessary chemical reactions for life. It’s almost as if this moon is a hidden ocean world that hasn't fully revealed its secrets yet. What do you make of the idea that we might already be missing opportunities to investigate?
There’s also the argument that if life exists there, it could be so different from what we know that it wouldn’t even register on our current detection methods. The concept of alien life in extreme conditions has become more accepted, but still, the silence is deafening. If Enceladus is indeed harboring life, how might it communicate, or even interact with us?
Given the technological advancements in astrobiology, do you think missions to Enceladus should be ramped up? Or are we still too far from making any concrete discoveries? The potential discoveries that await beneath its icy crust could change everything we know about life in the universe.
I can't help but feel a sense of urgency about exploring these outer moons. If one day we do confirm life on Enceladus, the implications for our understanding of life elsewhere would be monumental. It’s as if we’re on the brink of a major discovery, yet we’re still holding back. What if we discover that life is more common in our solar system than we ever imagined?
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By Avi Loeb Medium
A 1.5-Solar-Mass Star in a Tight Orbit Around the 4.3-Million Solar-Mass Black Hole at the Milky-Way Center
Time series of the orbits of various stars around the supermassive black hole, SgrA*, at the Milky-Way center, obtained from data by GRAVITY/VLT between 2021 to 2025. The new star S301 arrives within 140 Schwarzschild radii of the black hole where its peak velocity is 8.3% of the speed of light, 25,000 kilometers per second. (Image credit: Abd El Dayem et al. 2026)The fastest moving star, labeled S301, was discovered recently by Stefan Gillessen’s team at the Max Planck Institute for Extraterrestrial Physics in Garching, Germany (as first reported here, with the full paper accessible here). The star was discovered by near-infrared interferometry on 8-meter telescopes, using the GRAVITY instrument in operation at the European Southern Observatory’s (ESO’s) Very Large Telescope (VLT). Last night, I sat next to Stefan at the reception dinner of the annual conference of Harvard’s Black Hole Initiative, for which I served as the founding director a decade ago.
This 1.5-solar-mass star moves on a highly elliptical orbit with a period of 8.7 years and eccentricity of 0.98 around the supermassive black hole at the Milky-Way center, called Sagittarius A*. This black hole has a long history of swallowing 4.3 million solar masses of gas and stars from its environment. The peak velocity of S301 is 25,000 kilometers per second or 8.3% of the speed of light, as it comes down to a distance of 140 times the Schwarzschild radius of the black hole — which defines the scale of the black hole mouth from where even light cannot escape. If the star were to pass ten times closer to the black hole, it would have been ripped apart by tidal gravity into a stream of gas that shines brightly as it feeds the mouth of this spacetime beast.
The orbit of S301 can be used to test expectations from Albert Einstein’s formulation of gravity as the curvature of spacetime. Einstein’s equations predict that S301’s orbit will precess in response to the spin of the black hole, offering a precise new way to measure how fast Sagittarius A* is rotating within the coming decade.
How did this star get so close to the black hole?
A natural mechanism, proposed by Jack Hills in a 1988 paper published here, is the tidal break-up of a pair of stars by the black hole. About half of solar-mass stars form in binaries. When a binary star system gets close enough to the black hole, the tidal gravity becomes strong than the gravitational binding of the two stars and breaks the binary apart, sending one star out at a speed of up to thousands of kilometers per second and launching the second star into a tighter orbit around the black hole. Indeed, a population of hypervelocity stars had been discovered on their way out in the Milky-Way halo by Warren Brown and collaborators from the Harvard-Smithsonian Center for Astrophysics (as reported here).
In a 2006 paper published here, I proposed with the student, Idan Ginsburg, that the former companions of the observed hypervelocity stars in the Milky-Way halo might have produced the observed population of close-in S-stars on highly eccentric orbits around Sagittarius A*. The Galactic center star S301 is likely one of them, formed via the Hills mechanism out of an initial binary star system with an orbital period of 1–2 weeks over the past 100 million years.
In a follow-up paper published here, I showed with Idan that planets could survive the break-up of binary star systems by Sagittarius A*. As a result, Galactic travel agencies could sell tickets for thrilling journeys on habitable planets around hypervelocity stars. I wonder whether adventurous Galactic passengers would prefer to travel with a hypervelocity star on its way out of the Milky-Way galaxy at a speed of up to 1% of the speed of light or travel with a star like S301 as it reaches 8.3% of the speed of light and gets within a distance of 140 Schwarzschild radii from the largest black hole in our Galaxy. I would personally favor the latter, since the extreme spacetime structure of a supermassive black hole is far more exhilarating than the rarefied environment of intergalactic space. The trip close to the black hole also offers health benefits, since aging slows down by a third of a percent at closest approach of S301 to Sagittarius A*. This corresponds to a gain of 5 minutes to the passenger’s lifespan every day relative to distant relatives.
The black hole tour with S301 offers a view of the black hole’s mouth from a distance where it occupies roughly the same angle as the Moon or the Sun on our sky. The gas swirling into the event horizon of Sagittarius A* glows bright but at the center of this glow, there is a silhouette — a shadow cast by the absorption of light emanating behind the black hole. Over the decade between 2006 and 2016, I wrote 30 papers in collaboration with my postdoc, Avery Broderick, forecasting the expected portrait of a black hole (as detailed here and summarized for the general public here). By now, Sagittarius A* was imaged by the Event Horizon Telescope (here), whose headquarters was established at Harvard’s Black Hole Initiative during my directorship.
On a tour with S301, it would be fascinating to observed the silhouette image of Sagittarius A* from a minimum distance that is 140 million times closer than the Earth is from the black hole. I would have loved to serve as the tour guide on such a journey. Here’s hoping that Galactic travel agents would pay attention to this essay.
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
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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