正在加载视频...

视频加载失败

加载此视频时出现问题。这可能是由于临时网络问题，或视频可能不可用。

WHEN BLACK HOLES COLLIDE, THE UNIVERSE TREMBLES When two supermassive black holes collide, they don’t merge quietly, they shake the fabric of space and time, sending gravitational waves across the cosmos. One detected collision converted the mass of three suns into pure energy in just 0.2 seconds, producing 50... show more

Mario Nawfal

2,574,533 subscribers

33,487 次观看 • 11 个月前 •via X (Twitter)

Anya Rossi• Live Now

Private livecam show

0 条评论

暂无评论

原始帖子的评论将显示在这里

相关视频

Hubble Records Wandering Black Hole That Swallowed a Star NASA astronomers have recorded a rare event using the Hubble Space Telescope and other observatories — a tidal disruption event (TDE) involving a wandering black hole. It occurred 600 million light years from Earth and provided new insights into the behavior of black holes. The object was spotted due to gravitational lensing — the distortion of light from distant bodies under the influence of gravity. As it approached the star, the black hole tore it apart, creating a bright accretion disk that radiated in ultraviolet and visible light. Unlike typical black holes in the centers of galaxies, this one was located 2,600 light years from the core, where a supermassive black hole was already located. Despite their relative proximity, the two holes do not yet form a single system, but they may merge in the future.

Hubble Records Wandering Black Hole That Swallowed a Star NASA astronomers have recorded a rare event using the Hubble Space Telescope and other observatories — a tidal disruption event (TDE) involving a wandering black hole. It occurred 600 million light years from Earth and provided new insights into the behavior of black holes. The object was spotted due to gravitational lensing — the distortion of light from distant bodies under the influence of gravity. As it approached the star, the black hole tore it apart, creating a bright accretion disk that radiated in ultraviolet and visible light. Unlike typical black holes in the centers of galaxies, this one was located 2,600 light years from the core, where a supermassive black hole was already located. Despite their relative proximity, the two holes do not yet form a single system, but they may merge in the future.

Black Hole

72,990 次观看 • 1 年前

Hubble Records Wandering Black Hole That Swallowed a Star NASA astronomers have recorded a rare event using the Hubble Space Telescope and other observatories — a tidal disruption event (TDE) involving a wandering black hole. It occurred 600 million light years from Earth and provided new insights into the behavior of black holes. The object was spotted due to gravitational lensing — the distortion of light from distant bodies under the influence of gravity. As it approached the star, the black hole tore it apart, creating a bright accretion disk that radiated in ultraviolet and visible light. Unlike typical black holes in the centers of galaxies, this one was located 2,600 light years from the core, where a supermassive black hole was already located. Despite their relative proximity, the two holes do not yet form a single system, but they may merge in the future.

Hubble Records Wandering Black Hole That Swallowed a Star NASA astronomers have recorded a rare event using the Hubble Space Telescope and other observatories — a tidal disruption event (TDE) involving a wandering black hole. It occurred 600 million light years from Earth and provided new insights into the behavior of black holes. The object was spotted due to gravitational lensing — the distortion of light from distant bodies under the influence of gravity. As it approached the star, the black hole tore it apart, creating a bright accretion disk that radiated in ultraviolet and visible light. Unlike typical black holes in the centers of galaxies, this one was located 2,600 light years from the core, where a supermassive black hole was already located. Despite their relative proximity, the two holes do not yet form a single system, but they may merge in the future.

Black Hole

28,483 次观看 • 1 年前

Brian Cox is pointing at one dot. The dot is a galaxy with 100 billion stars. There are 200 billion more on the same map. The thin line at the top of that map represents a billion light-years. At the speed of light, it would take a billion years to cross that sliver. The math gets stranger. The observable universe holds roughly 30 sextillion stars. Every grain of sand on every beach on Earth combined is about 7.5 sextillion. The universe has 4x more stars than Earth has sand. The deeper number is which of those galaxies you can ever actually reach. Dark energy is accelerating cosmic expansion. Space itself is stretching faster than light can cross it. The cosmic event horizon sits at roughly 16 billion light-years from Earth. Anything past that is moving away from us faster than light can chase. We can see those galaxies because their photons left billions of years ago when the gap was small enough. We cannot reach them. We cannot send a signal. We cannot know what they look like now. 97% of the galaxies on Cox's map are already disconnected from our future. Visible artifacts of a past that has ended. Now look forward. In about 150 billion years, accelerating redshift will push every galaxy outside our Local Group beyond detection. Andromeda will have merged with the Milky Way. The other 199,999,999,999 galaxies will be invisible. Civilizations on planets around future stars will look up and see only one galaxy. Their telescopes will tell them the universe ends at the edge of the Local Group. They will not see cosmic background radiation. They will not observe expansion. They will not know about the Big Bang. The evidence will have receded past their light cone. Every astronomy textbook they could ever write would conclude the universe is small, static, and made of one galaxy. We exist in a 100-billion-year window where the universe is still legible. Before us, too hot, too dense, too young. After us, the lights go out one galaxy at a time. 30 sextillion stars on the map. A 100-billion-year window in which to read it. We exist inside the only overlap.

Brian Cox is pointing at one dot. The dot is a galaxy with 100 billion stars. There are 200 billion more on the same map. The thin line at the top of that map represents a billion light-years. At the speed of light, it would take a billion years to cross that sliver. The math gets stranger. The observable universe holds roughly 30 sextillion stars. Every grain of sand on every beach on Earth combined is about 7.5 sextillion. The universe has 4x more stars than Earth has sand. The deeper number is which of those galaxies you can ever actually reach. Dark energy is accelerating cosmic expansion. Space itself is stretching faster than light can cross it. The cosmic event horizon sits at roughly 16 billion light-years from Earth. Anything past that is moving away from us faster than light can chase. We can see those galaxies because their photons left billions of years ago when the gap was small enough. We cannot reach them. We cannot send a signal. We cannot know what they look like now. 97% of the galaxies on Cox's map are already disconnected from our future. Visible artifacts of a past that has ended. Now look forward. In about 150 billion years, accelerating redshift will push every galaxy outside our Local Group beyond detection. Andromeda will have merged with the Milky Way. The other 199,999,999,999 galaxies will be invisible. Civilizations on planets around future stars will look up and see only one galaxy. Their telescopes will tell them the universe ends at the edge of the Local Group. They will not see cosmic background radiation. They will not observe expansion. They will not know about the Big Bang. The evidence will have receded past their light cone. Every astronomy textbook they could ever write would conclude the universe is small, static, and made of one galaxy. We exist in a 100-billion-year window where the universe is still legible. Before us, too hot, too dense, too young. After us, the lights go out one galaxy at a time. 30 sextillion stars on the map. A 100-billion-year window in which to read it. We exist inside the only overlap.

Aakash Gupta

53,238 次观看 • 3 个月前

Physics is often taught in dry equations but Walter Lewin turns it into an edge of your seat thriller. He proves that the laws of nature are not just suggestions they are absolute. By releasing the ball from exactly 2.5 times the radius of the loop (h = 5/2 R) he demonstrates the perfect balance between gravitational potential energy and the kinetic energy required to maintain centripetal force. Watch as the math comes to life and the ball defies gravity through pure conservation of mechanical energy. This is what happens when you stop memorizing formulas and start witnessing the universe in motion.

Physics is often taught in dry equations but Walter Lewin turns it into an edge of your seat thriller. He proves that the laws of nature are not just suggestions they are absolute. By releasing the ball from exactly 2.5 times the radius of the loop (h = 5/2 R) he demonstrates the perfect balance between gravitational potential energy and the kinetic energy required to maintain centripetal force. Watch as the math comes to life and the ball defies gravity through pure conservation of mechanical energy. This is what happens when you stop memorizing formulas and start witnessing the universe in motion.

Cosmos Archive

188,720 次观看 • 3 个月前

“The black community was at its strongest economically while being segregated.” This is true. In the 1930s to 1960s, when actual legal racism existed, most black children grew up in a two-parent home. Black marriage rates at the time actually trumped white marriage rates. Now, with all the progress we’ve made, 75% of black children grow up without a father, and black women today have a lower marriage rate than black men and than white women. So the answer to all the black community’s problems CANNOT be “systemic racism,” if they were doing better back when racism was more prevalent and was actually written into laws.

“The black community was at its strongest economically while being segregated.” This is true. In the 1930s to 1960s, when actual legal racism existed, most black children grew up in a two-parent home. Black marriage rates at the time actually trumped white marriage rates. Now, with all the progress we’ve made, 75% of black children grow up without a father, and black women today have a lower marriage rate than black men and than white women. So the answer to all the black community’s problems CANNOT be “systemic racism,” if they were doing better back when racism was more prevalent and was actually written into laws.

Natalie Jean Beisner

268,038 次观看 • 11 个月前

GALACTIC SHOWDOWN: QUASAR ZAPS GALAXY IN EPIC COSMIC DUEL Astronomers have caught two galaxies in a cosmic duel that would make any medieval knight jealous. One galaxy used its secret weapon a quasar a blinding beam of energy powered by a supermassive black hole to blast its rival into pieces. This cosmic standoff happened 11 billion years ago when the Universe was a teenager at just 18 percent of its current age. The quasar’s beam stripped away gas clouds in the other galaxy shrinking them so they could no longer make stars. It was like the quasar slammed the door on its opponent’s future. Researchers used powerful telescopes in Chile’s Atacama Desert to watch this drama unfold. ALMA’s sharp vision and VLT’s precise measurements let them see how the quasar’s energy gutted the other galaxy. Meanwhile the quasar feasted on the chaos pulling in even more gas to power its deadly glow. Scientists think more of these cosmic jousts are out there waiting to be discovered. The next time you see a star twinkle remember it might just be the last light of a cosmic feud that never ended. Source: SciTech Daily

GALACTIC SHOWDOWN: QUASAR ZAPS GALAXY IN EPIC COSMIC DUEL Astronomers have caught two galaxies in a cosmic duel that would make any medieval knight jealous. One galaxy used its secret weapon a quasar a blinding beam of energy powered by a supermassive black hole to blast its rival into pieces. This cosmic standoff happened 11 billion years ago when the Universe was a teenager at just 18 percent of its current age. The quasar’s beam stripped away gas clouds in the other galaxy shrinking them so they could no longer make stars. It was like the quasar slammed the door on its opponent’s future. Researchers used powerful telescopes in Chile’s Atacama Desert to watch this drama unfold. ALMA’s sharp vision and VLT’s precise measurements let them see how the quasar’s energy gutted the other galaxy. Meanwhile the quasar feasted on the chaos pulling in even more gas to power its deadly glow. Scientists think more of these cosmic jousts are out there waiting to be discovered. The next time you see a star twinkle remember it might just be the last light of a cosmic feud that never ended. Source: SciTech Daily

Mario Nawfal

78,948 次观看 • 1 年前

Elon Musk said the most important thing anyone has said this century. Musk: “I think we need to assume that life and consciousness is extremely rare, and it might only be us.” 13.8 billion years. Trillions of galaxies. Billions of trillions of stars. Not one signal from any of them. That silence is the loudest data point in human history. Musk: “The image in my mind is of a tiny candle in a vast darkness. A tiny candle of consciousness that could easily go out.” That is not poetry. That is a threat assessment from the only person on Earth building the response. Stars don’t know they burn. Black holes don’t know they consume. The universe has been running for 13.8 billion years with no awareness of itself. We are the only known point in all of that time and all of that space where matter woke up and understood what it was looking at. Every law of nature ran in complete silence for billions of years. Gravity pulled. Light traveled. Elements fused. None of it meant anything. Because meaning requires a mind. And there might only be one. Musk is not building rockets because he likes engineering. He is building an escape route for the only thing in the universe that knows the universe exists. If consciousness disappears, the stars keep burning. The physics keeps running. But the universe is no longer a universe. It is just matter moving through space with nothing to call it that. The most profound thing Musk said is not that the candle is small. It is that without the candle, there is no such thing as light or darkness. Just physics performing to an empty room for the rest of eternity. One man looked at that and said no.

Elon Musk said the most important thing anyone has said this century. Musk: “I think we need to assume that life and consciousness is extremely rare, and it might only be us.” 13.8 billion years. Trillions of galaxies. Billions of trillions of stars. Not one signal from any of them. That silence is the loudest data point in human history. Musk: “The image in my mind is of a tiny candle in a vast darkness. A tiny candle of consciousness that could easily go out.” That is not poetry. That is a threat assessment from the only person on Earth building the response. Stars don’t know they burn. Black holes don’t know they consume. The universe has been running for 13.8 billion years with no awareness of itself. We are the only known point in all of that time and all of that space where matter woke up and understood what it was looking at. Every law of nature ran in complete silence for billions of years. Gravity pulled. Light traveled. Elements fused. None of it meant anything. Because meaning requires a mind. And there might only be one. Musk is not building rockets because he likes engineering. He is building an escape route for the only thing in the universe that knows the universe exists. If consciousness disappears, the stars keep burning. The physics keeps running. But the universe is no longer a universe. It is just matter moving through space with nothing to call it that. The most profound thing Musk said is not that the candle is small. It is that without the candle, there is no such thing as light or darkness. Just physics performing to an empty room for the rest of eternity. One man looked at that and said no.

Dustin

60,910 次观看 • 1 个月前

🇺🇸 THE UNIVERSE’S OG STARS JUST STOLE THE SPOTLIGHT Astronomers at UT Austin may have bagged the holy grail: the first stars ever born. Meet galaxy GLIMPSE-16403, a 13-billion-year-old fossil glowing from the Cosmic Dawn. These aren’t your chill suburban suns. Population III stars were massive, short-lived beasts - burning out in a few million years before going supernova and seeding the cosmos with the carbon, oxygen, and iron that make literally everything (including you). Think of them as the universe’s original factories, churning raw hydrogen and helium into the building blocks of life, planets, and heavy metals. Without them? No Earth, no iPhones, no bad Netflix reboots. The James Webb Space Telescope sniffed them out by spotting pristine radiation - hydrogen and helium, untouched by later elements. A cosmic fingerprint from the dawn of time. Source: UT Austin, Black Hole

🇺🇸 THE UNIVERSE’S OG STARS JUST STOLE THE SPOTLIGHT Astronomers at UT Austin may have bagged the holy grail: the first stars ever born. Meet galaxy GLIMPSE-16403, a 13-billion-year-old fossil glowing from the Cosmic Dawn. These aren’t your chill suburban suns. Population III stars were massive, short-lived beasts - burning out in a few million years before going supernova and seeding the cosmos with the carbon, oxygen, and iron that make literally everything (including you). Think of them as the universe’s original factories, churning raw hydrogen and helium into the building blocks of life, planets, and heavy metals. Without them? No Earth, no iPhones, no bad Netflix reboots. The James Webb Space Telescope sniffed them out by spotting pristine radiation - hydrogen and helium, untouched by later elements. A cosmic fingerprint from the dawn of time. Source: UT Austin, Black Hole

Mario Nawfal

32,499 次观看 • 11 个月前

COACHES: Here is a GREAT teaching clip of something I see in youth hockey all the time. A player will skate the puck towards one of their teammates and will then pass it to them. It's one of my biggest pet peeves in the game. When you skate the puck towards your teammate, you're effectively bringing defenders towards them too so when you give them the puck you've put them in a difficult spot because now with more defenders near they have less time and space to make a play. This clip is a great example. The CHI defenseman skates the puck toward his partner and then tries to give him a pass. They turn the puck over with two CAR forecheckers now right there and the puck ends up in the back of the net. In youth hockey you see defenseman do this a lot and even more so they'll skate it towards their winger and then give them the puck either on the breakout or in the neutral zone. A better solution would be to move it right away or suck defenders towards you (and away from) your teammate so when you pass to them they'll have more time and space. Phenomenal teaching clip on time and space!!

COACHES: Here is a GREAT teaching clip of something I see in youth hockey all the time. A player will skate the puck towards one of their teammates and will then pass it to them. It's one of my biggest pet peeves in the game. When you skate the puck towards your teammate, you're effectively bringing defenders towards them too so when you give them the puck you've put them in a difficult spot because now with more defenders near they have less time and space to make a play. This clip is a great example. The CHI defenseman skates the puck toward his partner and then tries to give him a pass. They turn the puck over with two CAR forecheckers now right there and the puck ends up in the back of the net. In youth hockey you see defenseman do this a lot and even more so they'll skate it towards their winger and then give them the puck either on the breakout or in the neutral zone. A better solution would be to move it right away or suck defenders towards you (and away from) your teammate so when you pass to them they'll have more time and space. Phenomenal teaching clip on time and space!!

Topher Scott

38,600 次观看 • 3 个月前

What is the Spacetime Aether? Conventional physics would claim that space is an empty vacuum. It discounts the 'Zero-Point Energy' (ZPE) constantly fluctuating in and out of existence. The Casimir force shows us there is a latent negative energy pressure when we put two parallel plates close to one another. They suddenly attract. There must be quantum fluctuations we can't see. We invented 'dark matter' to explain why there appears to be more stickiness with stars that orbit their galaxies. We invented 'dark energy' to explain how the universe can expand faster than the speed of light. What if we add up all the quantum fluctuations across the cosmos? That would be a massive amount of energy. Could that account for 'dark matter?' What if we take it a step further and assume the quantum fluctuations are just the energy seeping through from a vast ocean of potential energy? Could that account for 'dark energy?' That ocean of energy is Spacetime Aether. Tapping into it represents a new source of practically unlimited power for humanity.

What is the Spacetime Aether? Conventional physics would claim that space is an empty vacuum. It discounts the 'Zero-Point Energy' (ZPE) constantly fluctuating in and out of existence. The Casimir force shows us there is a latent negative energy pressure when we put two parallel plates close to one another. They suddenly attract. There must be quantum fluctuations we can't see. We invented 'dark matter' to explain why there appears to be more stickiness with stars that orbit their galaxies. We invented 'dark energy' to explain how the universe can expand faster than the speed of light. What if we add up all the quantum fluctuations across the cosmos? That would be a massive amount of energy. Could that account for 'dark matter?' What if we take it a step further and assume the quantum fluctuations are just the energy seeping through from a vast ocean of potential energy? Could that account for 'dark energy?' That ocean of energy is Spacetime Aether. Tapping into it represents a new source of practically unlimited power for humanity.

Ashton Forbes

92,416 次观看 • 2 年前

Another Galaxy Without Dark Matter Dark matter is thought to account for about 85% of the Universe's total mass, yet there are galaxies that stubbornly refuse to conform to this rule. A team of astronomers led by researchers from Yale, using the Keck Observatory, has discovered a third such galaxy: the faint dwarf DF9, which appears to lack invisible mass entirely. The concept of dark matter emerged in the 1970s, when Vera Rubin first convincingly demonstrated that galaxies are held together by some form of invisible mass. Since then, a wealth of indirect evidence—such as galactic halos and gravitational lensing—has accumulated. This makes the exceptions all the more intriguing. DF9 sits alongside two other similarly "empty" galaxies—DF2 and DF4—as part of an elongated chain of seven galaxies located 45 million light-years away; all of them appear to have originated from a single event. How was this determined? By analyzing stellar motion, the team estimated DF9's mass at approximately 100 million solar masses—a figure that matches the combined mass of its visible stars, gas, and dust. Had dark matter been present, the total mass would have been roughly a hundred times greater. The necessary precision was achieved using the KCWI spectrograph on the Keck telescope, an instrument specifically designed to detect extremely faint light sources. It appears that DF2, DF4, and DF9 formed during a high-speed galactic collision that stripped gas clouds away from their dark matter halos, allowing the new galaxies to coalesce from ordinary matter alone. Lead author Michael Keim notes that a chain of dark-matter-free galaxies has never been observed before. His supervisor, Pieter van Dokkum, adds that this provides compelling evidence that dark matter is a genuine physical substance rather than merely a "correction" to the theory of gravity.

Another Galaxy Without Dark Matter Dark matter is thought to account for about 85% of the Universe's total mass, yet there are galaxies that stubbornly refuse to conform to this rule. A team of astronomers led by researchers from Yale, using the Keck Observatory, has discovered a third such galaxy: the faint dwarf DF9, which appears to lack invisible mass entirely. The concept of dark matter emerged in the 1970s, when Vera Rubin first convincingly demonstrated that galaxies are held together by some form of invisible mass. Since then, a wealth of indirect evidence—such as galactic halos and gravitational lensing—has accumulated. This makes the exceptions all the more intriguing. DF9 sits alongside two other similarly "empty" galaxies—DF2 and DF4—as part of an elongated chain of seven galaxies located 45 million light-years away; all of them appear to have originated from a single event. How was this determined? By analyzing stellar motion, the team estimated DF9's mass at approximately 100 million solar masses—a figure that matches the combined mass of its visible stars, gas, and dust. Had dark matter been present, the total mass would have been roughly a hundred times greater. The necessary precision was achieved using the KCWI spectrograph on the Keck telescope, an instrument specifically designed to detect extremely faint light sources. It appears that DF2, DF4, and DF9 formed during a high-speed galactic collision that stripped gas clouds away from their dark matter halos, allowing the new galaxies to coalesce from ordinary matter alone. Lead author Michael Keim notes that a chain of dark-matter-free galaxies has never been observed before. His supervisor, Pieter van Dokkum, adds that this provides compelling evidence that dark matter is a genuine physical substance rather than merely a "correction" to the theory of gravity.

Black Hole

24,271 次观看 • 1 个月前

The Dark Energy Spectroscopic Instrument (DESI) has released Data Release 1 (DR1), presenting the largest and most detailed 3D map of the universe to date. This dataset encompasses information on 18.7 million celestial objects, including approximately 4 million stars, 13.1 million galaxies, and 1.6 million quasars, extending back 11 billion years. DESI, situated on the Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory in Arizona, aims to elucidate the nature of dark energy. The comprehensive data from DR1 not only aids in understanding dark energy but also offers insights into galaxy evolution, black holes, dark matter, and the structure of the Milky Way. Notably, initial analyses of DESI's data suggest that dark energy may not be a constant force as previously thought. Observations indicate that the universe's expansion rate, influenced by dark energy, has varied over time, challenging existing cosmological models and potentially altering our understanding of the universe's fate. The data from DR1 is publicly accessible through the National Energy Research Scientific Computing Center (NERSC) and can be explored via the Legacy Survey Sky Browser. 🌻

The Dark Energy Spectroscopic Instrument (DESI) has released Data Release 1 (DR1), presenting the largest and most detailed 3D map of the universe to date. This dataset encompasses information on 18.7 million celestial objects, including approximately 4 million stars, 13.1 million galaxies, and 1.6 million quasars, extending back 11 billion years. DESI, situated on the Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory in Arizona, aims to elucidate the nature of dark energy. The comprehensive data from DR1 not only aids in understanding dark energy but also offers insights into galaxy evolution, black holes, dark matter, and the structure of the Milky Way. Notably, initial analyses of DESI's data suggest that dark energy may not be a constant force as previously thought. Observations indicate that the universe's expansion rate, influenced by dark energy, has varied over time, challenging existing cosmological models and potentially altering our understanding of the universe's fate. The data from DR1 is publicly accessible through the National Energy Research Scientific Computing Center (NERSC) and can be explored via the Legacy Survey Sky Browser. 🌻

Erika 

18,609 次观看 • 1 年前

A one-in-a-million chance—and it happened. A team from the Technical University of Munich spent six years compiling a list of promising gravitational lenses and waiting for a supernova to explode behind one of them. In August 2025, it happened. A superluminous supernova 10 billion light-years away was located precisely behind two foreground galaxies—and its light, bent by gravity, produced five images of the same explosion. Typically, lenses produce two or four—five was a surprise even to the authors. The supernova was named SN Winny. The odds of such a coincidence are less than one in a million. But the value of the discovery is enormous. Light from the supernova travels to us along different paths around the lensing galaxies, and each path has its own length. Because of this, the five copies appear with different time delays. By measuring these delays and knowing the mass distribution in the lensing galaxies, one can directly calculate the Hubble-Lemaître constant, or the rate of expansion of the Universe. How is this better than existing methods? The classic "cosmic distance scale" is a multi-step process, with errors accumulating from step to step. Microwave background radiation measurements are precise, but depend on models of the evolution of the Universe. The lensed supernova method is a single-step process, with completely different sources of error. SN Winny is particularly convenient: it is lensed by just two individual galaxies with a simple mass distribution, rather than a complex cluster. SN Winny is currently being observed by telescopes around the world. The results could bring us closer to resolving the Hubble controversy—the discrepancy between the two main methods for measuring the expansion rate.

A one-in-a-million chance—and it happened. A team from the Technical University of Munich spent six years compiling a list of promising gravitational lenses and waiting for a supernova to explode behind one of them. In August 2025, it happened. A superluminous supernova 10 billion light-years away was located precisely behind two foreground galaxies—and its light, bent by gravity, produced five images of the same explosion. Typically, lenses produce two or four—five was a surprise even to the authors. The supernova was named SN Winny. The odds of such a coincidence are less than one in a million. But the value of the discovery is enormous. Light from the supernova travels to us along different paths around the lensing galaxies, and each path has its own length. Because of this, the five copies appear with different time delays. By measuring these delays and knowing the mass distribution in the lensing galaxies, one can directly calculate the Hubble-Lemaître constant, or the rate of expansion of the Universe. How is this better than existing methods? The classic "cosmic distance scale" is a multi-step process, with errors accumulating from step to step. Microwave background radiation measurements are precise, but depend on models of the evolution of the Universe. The lensed supernova method is a single-step process, with completely different sources of error. SN Winny is particularly convenient: it is lensed by just two individual galaxies with a simple mass distribution, rather than a complex cluster. SN Winny is currently being observed by telescopes around the world. The results could bring us closer to resolving the Hubble controversy—the discrepancy between the two main methods for measuring the expansion rate.

Black Hole

180,949 次观看 • 5 个月前

Earth Could Survive the Sun's Death: New Models Offer Hope 🟠 Our planet has a chance of surviving the Sun's transformation into a red giant and avoiding total destruction in its thermonuclear inferno. Earth's ultimate fate will be determined by a delicate balance between the gravitational pull of the swelling star and its loss of mass; as the star loses mass, its gravitational grip will weaken, allowing the planet to drift to a safer orbit. Astronomers from KU Leuven (Belgium) have revised predictions regarding the future of the Solar System. They conducted gravitational simulations that accounted for the internal structure of aging stars, and their findings were published in the journal *Astronomy & Astrophysics*. In approximately five billion years, the Sun will exhaust the hydrogen fuel in its core, causing it to expand hundreds of times in size and transform into a massive red giant. At that point, a "tug-of-war" will begin within the Solar System, the outcome of which will decide Earth's fate. On one hand, the star's massive expansion will generate powerful tidal effects that act to slow Earth down and drag it inward. On the other hand, the star will actively shed its outer layers into space via powerful stellar winds. As it loses mass, the Sun will become lighter and its gravitational grip will weaken, enabling Earth to migrate further out into the Solar System. Updated calculations indicate that the effect of the Sun's mass loss could counteract tidal drag; in this scenario, our planet would have time to shift to a more distant orbit lying just beyond the radius of the expanded star. To validate their theoretical calculations, the scientists turned to actual observations of the dying giant star L2 Puppis, located 200 light-years away. In the past, it closely resembled the Sun, but now it is rapidly losing mass and is surrounded by a dust disk in which a large planet orbits. The fact that this world survived gives scientists strong grounds to hope that Earth might also be saved. However, there is no cause for optimism regarding our own system's neighbors: computer simulations indicate that Mercury and Venus will inevitably be completely consumed by the flames of the dying star. The launch of the PLATO space telescope will help settle the debate about our planet's future once and for all. It is scheduled to enter orbit next year to search for exop всяlanets around aging stars. 🌙

Earth Could Survive the Sun's Death: New Models Offer Hope 🟠 Our planet has a chance of surviving the Sun's transformation into a red giant and avoiding total destruction in its thermonuclear inferno. Earth's ultimate fate will be determined by a delicate balance between the gravitational pull of the swelling star and its loss of mass; as the star loses mass, its gravitational grip will weaken, allowing the planet to drift to a safer orbit. Astronomers from KU Leuven (Belgium) have revised predictions regarding the future of the Solar System. They conducted gravitational simulations that accounted for the internal structure of aging stars, and their findings were published in the journal Astronomy & Astrophysics. In approximately five billion years, the Sun will exhaust the hydrogen fuel in its core, causing it to expand hundreds of times in size and transform into a massive red giant. At that point, a "tug-of-war" will begin within the Solar System, the outcome of which will decide Earth's fate. On one hand, the star's massive expansion will generate powerful tidal effects that act to slow Earth down and drag it inward. On the other hand, the star will actively shed its outer layers into space via powerful stellar winds. As it loses mass, the Sun will become lighter and its gravitational grip will weaken, enabling Earth to migrate further out into the Solar System. Updated calculations indicate that the effect of the Sun's mass loss could counteract tidal drag; in this scenario, our planet would have time to shift to a more distant orbit lying just beyond the radius of the expanded star. To validate their theoretical calculations, the scientists turned to actual observations of the dying giant star L2 Puppis, located 200 light-years away. In the past, it closely resembled the Sun, but now it is rapidly losing mass and is surrounded by a dust disk in which a large planet orbits. The fact that this world survived gives scientists strong grounds to hope that Earth might also be saved. However, there is no cause for optimism regarding our own system's neighbors: computer simulations indicate that Mercury and Venus will inevitably be completely consumed by the flames of the dying star. The launch of the PLATO space telescope will help settle the debate about our planet's future once and for all. It is scheduled to enter orbit next year to search for exop всяlanets around aging stars. 🌙

Black Hole

23,916 次观看 • 24 天前

What Would Happen if You Fell into a Black Hole? ✍️ Falling into a black hole is a journey into the extremes of physics, where the laws of nature as we know them are pushed to their limits. Here's what you might experience: Approaching the Event Horizon: As you draw near, the gravitational pull intensifies dramatically. The side of your body closer to the black hole experiences a stronger force than the side farther away, leading to a stretching effect commonly referred to as spaghettification. This term vividly describes how objects are stretched into long, thin shapes in a strong gravitational field. Crossing the Event Horizon: The event horizon is the boundary beyond which nothing can escape the black hole's gravitational grip. Interestingly, if you were to cross this threshold, you might not notice an immediate change; however, from an outside observer's perspective, time appears to slow down for you, and you'd seem to freeze at the horizon. This phenomenon is due to the extreme warping of spacetime predicted by Einstein's theory of general relativity. Inside the Black Hole: Once past the event horizon, all paths lead inexorably to the singularity—the core where density becomes infinite and the known laws of physics cease to function. Here, the concepts of space and time become indistinguishable, and the gravitational forces are so overwhelming that escape is impossible. The journey to the singularity would be swift, and the tidal forces would ultimately lead to your disintegration. Note : It's important to note that these descriptions are based on our current understanding of physics, particularly general relativity. The true nature of black holes remains one of the most intriguing mysteries in astrophysics, with ongoing research striving to unravel their secrets. 📹 Credit NASA

What Would Happen if You Fell into a Black Hole? ✍️ Falling into a black hole is a journey into the extremes of physics, where the laws of nature as we know them are pushed to their limits. Here's what you might experience: Approaching the Event Horizon: As you draw near, the gravitational pull intensifies dramatically. The side of your body closer to the black hole experiences a stronger force than the side farther away, leading to a stretching effect commonly referred to as spaghettification. This term vividly describes how objects are stretched into long, thin shapes in a strong gravitational field. Crossing the Event Horizon: The event horizon is the boundary beyond which nothing can escape the black hole's gravitational grip. Interestingly, if you were to cross this threshold, you might not notice an immediate change; however, from an outside observer's perspective, time appears to slow down for you, and you'd seem to freeze at the horizon. This phenomenon is due to the extreme warping of spacetime predicted by Einstein's theory of general relativity. Inside the Black Hole: Once past the event horizon, all paths lead inexorably to the singularity—the core where density becomes infinite and the known laws of physics cease to function. Here, the concepts of space and time become indistinguishable, and the gravitational forces are so overwhelming that escape is impossible. The journey to the singularity would be swift, and the tidal forces would ultimately lead to your disintegration. Note : It's important to note that these descriptions are based on our current understanding of physics, particularly general relativity. The true nature of black holes remains one of the most intriguing mysteries in astrophysics, with ongoing research striving to unravel their secrets. 📹 Credit NASA

Physics In History

37,394 次观看 • 1 年前

The secret of our eternity: A rifle in one hand, a prayer book in the other. 🙏 Watch these lions, just moments before crossing into Lebanon, reciting the Traveler’s Prayer (Tefilat HaDerech). This is the true face of the IDF not just tactical power, but an unbreakable spiritual fire. They don’t go alone, they go with the God of Israel and the prayers of an entire nation behind them. When our warriors call out to Heaven from the depths of an armored vehicle, the enemy should tremble. The Spirit of Israel is invincible. May Hashem protect their going out and their coming in, from this time forth and forevermore. Bring them home in victory! 🇮🇱

The secret of our eternity: A rifle in one hand, a prayer book in the other. 🙏 Watch these lions, just moments before crossing into Lebanon, reciting the Traveler’s Prayer (Tefilat HaDerech). This is the true face of the IDF not just tactical power, but an unbreakable spiritual fire. They don’t go alone, they go with the God of Israel and the prayers of an entire nation behind them. When our warriors call out to Heaven from the depths of an armored vehicle, the enemy should tremble. The Spirit of Israel is invincible. May Hashem protect their going out and their coming in, from this time forth and forevermore. Bring them home in victory! 🇮🇱

AMIRAN 🇮🇱

10,826 次观看 • 4 个月前

The Orbits of Two Hearts (When "I" Becomes "We")🤩🥰 It all began with a single, frozen moment. A solitary frame where time, for some reason, chose to stand still. Yet within this suspended fragment of reality lay an entire universe demanding life, breath, and motion. Summer sews their shadows into one. In the sun-drenched forest, they are two celestial bodies that have chanced upon the same orbit. They still play their familiar games, gathering wild strawberries and sunbeams, unaware of how their own gravity has already inextricably intertwined their paths. Footsteps in unison, a gaze harboring a hidden planet in its depths - it all rings out as joyful laughter, yet the echo returns on a different, far deeper frequency. And then the storm arrives. Sudden, like the dawn of realization itself. The wind tears at the leaves, the outside world crumbles, and in this catastrophe, only one anchor remains - a shoulder beneath soaked fabric. In intertwined fingers and ragged breath hides the first, purest fear: the dread of loss. They shelter each other from the downpour, not yet fully comprehending that they are already hiding in one another from the rest of the world. When the clouds part, time slows its flight for good. The golden hour strikes its final, poignant chords. In the soft, dusty light, boundaries dissolve. The one who carefully brushes a stray lock from the other's forehead, and the one who goes utterly still beneath that touch - they stand on the precipice of a profound silence. This is more than friendship. It is the gravity of souls. They look at one another as if seeing infinity reflected in another's eyes for the very first time. They do not yet possess the words for these feelings, for human language was designed for lesser things. They do not know what to do with this, yet every fiber of their being senses the truth: they have become for each other that very center of the universe, the only point worth orbiting. This story is not about labels or definitions. It is about the pure, undiluted energy of devotion. About that exact moment when two "I"s melt away to make room for an absolute "We". A story born from a single photograph, destined to serve as a reminder: the deepest, most achingly beautiful gravity in the universe is not the pull of the stars. It is the gaze of the one who has become your entire world. 🤩🥰 #YoungHearts #гравитация #thegravityofus #кинематограф #cinematic #эстетика #aesthetic #большечемдружба #deepconnection #золотойчас #goldenhour #ожившаяфотография #aivideo #fyp #рек #bbart #boyloveboy #cinematicart #aiart #viral #foryou #unspokenwords #morethanfriends #devotion

The Orbits of Two Hearts (When "I" Becomes "We")🤩🥰 It all began with a single, frozen moment. A solitary frame where time, for some reason, chose to stand still. Yet within this suspended fragment of reality lay an entire universe demanding life, breath, and motion. Summer sews their shadows into one. In the sun-drenched forest, they are two celestial bodies that have chanced upon the same orbit. They still play their familiar games, gathering wild strawberries and sunbeams, unaware of how their own gravity has already inextricably intertwined their paths. Footsteps in unison, a gaze harboring a hidden planet in its depths - it all rings out as joyful laughter, yet the echo returns on a different, far deeper frequency. And then the storm arrives. Sudden, like the dawn of realization itself. The wind tears at the leaves, the outside world crumbles, and in this catastrophe, only one anchor remains - a shoulder beneath soaked fabric. In intertwined fingers and ragged breath hides the first, purest fear: the dread of loss. They shelter each other from the downpour, not yet fully comprehending that they are already hiding in one another from the rest of the world. When the clouds part, time slows its flight for good. The golden hour strikes its final, poignant chords. In the soft, dusty light, boundaries dissolve. The one who carefully brushes a stray lock from the other's forehead, and the one who goes utterly still beneath that touch - they stand on the precipice of a profound silence. This is more than friendship. It is the gravity of souls. They look at one another as if seeing infinity reflected in another's eyes for the very first time. They do not yet possess the words for these feelings, for human language was designed for lesser things. They do not know what to do with this, yet every fiber of their being senses the truth: they have become for each other that very center of the universe, the only point worth orbiting. This story is not about labels or definitions. It is about the pure, undiluted energy of devotion. About that exact moment when two "I"s melt away to make room for an absolute "We". A story born from a single photograph, destined to serve as a reminder: the deepest, most achingly beautiful gravity in the universe is not the pull of the stars. It is the gaze of the one who has become your entire world. 🤩🥰 #YoungHearts #гравитация #thegravityofus #кинематограф #cinematic #эстетика #aesthetic #большечемдружба #deepconnection #золотойчас #goldenhour #ожившаяфотография #aivideo #fyp #рек #bbart #boyloveboy #cinematicart #aiart #viral #foryou #unspokenwords #morethanfriends #devotion

BB Art

96,905 次观看 • 27 天前

In the UK “A new study looked at the top 500 adverts shown across all stations over two four-week periods on British television” - Despite comprising just 4% of the population, over 50% of TV commercials shown on UK TV featured black people - Just in the past 6 years, black people featuring in commercials has also risen from 37% to over 50%, yet the black population of the country barely rising - When it's a mixed-race couple, overwhelmingly the man is always black and the woman is white (A clear agenda) - It’s not just TV ads, public street ads follow the same pattern. Showing a black male with a white female - Over 80% of the country is still white yet more than half the ads are of blacks “The data's in, it's all confirmed, and they're doing it deliberately — A clear agenda” This sounds very familiar to what’s happening in America

In the UK “A new study looked at the top 500 adverts shown across all stations over two four-week periods on British television” - Despite comprising just 4% of the population, over 50% of TV commercials shown on UK TV featured black people - Just in the past 6 years, black people featuring in commercials has also risen from 37% to over 50%, yet the black population of the country barely rising - When it's a mixed-race couple, overwhelmingly the man is always black and the woman is white (A clear agenda) - It’s not just TV ads, public street ads follow the same pattern. Showing a black male with a white female - Over 80% of the country is still white yet more than half the ads are of blacks “The data's in, it's all confirmed, and they're doing it deliberately — A clear agenda” This sounds very familiar to what’s happening in America

Wall Street Apes

23,900 次观看 • 10 个月前