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🚨#BREAKING: NASA officials say a large asteroid could pass close enough to Earth within the next decade that there's a chance it could strike the planet 📌#Earth | #OuterSpace According to NASA's Center for Near-Earth Object Studies, a large asteroid could pass close enough to Earth within the next...

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❗️🪨🌎 - NASA and the ESA have increased the probability of Earth impact by asteroid 2024 YR4 to 2.3% in 2032. This asteroid, ranging between 40 to 90 meters (131 to 295 feet) in diameter, is classified at level 3 on the Torino Scale, which assesses the threat level of near-Earth objects from 0 to 10. The potential impact corridor for 2024 YR4 stretches across the Eastern Pacific Ocean, Northern South America, the Atlantic Ocean, Africa, the Arabian Sea, and Southern Asia. This path puts countries like Ecuador, Colombia, Venezuela, India, Pakistan, Bangladesh, Nigeria, Sudan, and Ethiopia at risk. While 2024 YR4 is too small to cause a global catastrophe, it could devastate a city, similar to the Tunguska event of 1908, where a 30 to 50-meter (98 to 164 feet) asteroid flattened over 2,150 square kilometers (830 square miles) of Siberian forest, destroying 80 million trees. There's a higher chance it would explode in the atmosphere, creating a significant shockwave, but if it were metallic, it might not fragment and could create an impact crater over a kilometer (0.62 miles) wide.
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❗️🪨🌎 - NASA and the ESA have increased the probability of Earth impact by asteroid 2024 YR4 to 2.3% in 2032. This asteroid, ranging between 40 to 90 meters (131 to 295 feet) in diameter, is classified at level 3 on the Torino Scale, which assesses the threat level of near-Earth objects from 0 to 10. The potential impact corridor for 2024 YR4 stretches across the Eastern Pacific Ocean, Northern South America, the Atlantic Ocean, Africa, the Arabian Sea, and Southern Asia. This path puts countries like Ecuador, Colombia, Venezuela, India, Pakistan, Bangladesh, Nigeria, Sudan, and Ethiopia at risk. While 2024 YR4 is too small to cause a global catastrophe, it could devastate a city, similar to the Tunguska event of 1908, where a 30 to 50-meter (98 to 164 feet) asteroid flattened over 2,150 square kilometers (830 square miles) of Siberian forest, destroying 80 million trees. There's a higher chance it would explode in the atmosphere, creating a significant shockwave, but if it were metallic, it might not fragment and could create an impact crater over a kilometer (0.62 miles) wide.

🔥🗞The Informant

41,226 görüntüleme • 1 yıl önce

🪨 Real footage captured by the OSIRIS-REx spacecraft near the surface of the near-Earth asteroid Bennu! The spacecraft visited the asteroid to refine the calculation of its orbit through the year 2300 and to collect surface samples. 🛰️☝️ Refining Bennu's orbit revealed that a collision with Earth could occur on September 24, 2182, with a probability of 0.04%.
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🪨 Real footage captured by the OSIRIS-REx spacecraft near the surface of the near-Earth asteroid Bennu! The spacecraft visited the asteroid to refine the calculation of its orbit through the year 2300 and to collect surface samples. 🛰️☝️ Refining Bennu's orbit revealed that a collision with Earth could occur on September 24, 2182, with a probability of 0.04%.

Black Hole

27,343 görüntüleme • 2 ay önce

Asteroid Apophis is coming back. Apophis stands out as the most dangerous asteroid that passes close to our planet. In March 2021, it had a close encounter with Earth, and it's poised to return in 2029. During its 2029 closest approach, Apophis will pass within.... 1/
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Asteroid Apophis is coming back. Apophis stands out as the most dangerous asteroid that passes close to our planet. In March 2021, it had a close encounter with Earth, and it's poised to return in 2029. During its 2029 closest approach, Apophis will pass within.... 1/

Erika 

354,742 görüntüleme • 3 yıl önce

An asteroid the size of three football fields is heading toward Earth It’s the asteroid “God of Chaos,” which is expected to approach the planet in about three years. By space standards, it will pass very close — closer than some satellites — and may even be visible without a telescope. NASA classifies it as a potentially hazardous object, but that doesn’t mean a collision is expected — it simply means it’s being closely monitored.
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An asteroid the size of three football fields is heading toward Earth It’s the asteroid “God of Chaos,” which is expected to approach the planet in about three years. By space standards, it will pass very close — closer than some satellites — and may even be visible without a telescope. NASA classifies it as a potentially hazardous object, but that doesn’t mean a collision is expected — it simply means it’s being closely monitored.

NEXTA

187,212 görüntüleme • 5 ay önce

Earth + Theia = MOON Once upon a time — about 4.5 billion years ago — Earth wasn't alone. A rogue planet, Theia, nearly the size of Mars, smashed into it at full speed. The result? A fiery collision that could have created the Moon in just a FEW HOURS, not the millennia previously thought. NASA supercomputer simulations show that the Moon wasn't pieced together from space debris, but was instantly born from molten fragments of Earth and Theia thrown into orbit. That's why the Moon is so similar to Earth — it's not just a satellite, it's a sister.
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Earth + Theia = MOON Once upon a time — about 4.5 billion years ago — Earth wasn't alone. A rogue planet, Theia, nearly the size of Mars, smashed into it at full speed. The result? A fiery collision that could have created the Moon in just a FEW HOURS, not the millennia previously thought. NASA supercomputer simulations show that the Moon wasn't pieced together from space debris, but was instantly born from molten fragments of Earth and Theia thrown into orbit. That's why the Moon is so similar to Earth — it's not just a satellite, it's a sister.

Black Hole

26,433 görüntüleme • 1 yıl önce

🚨 NASA JUST FOUND THE RAW INGREDIENTS OF DNA INSIDE A ROCK OLDER THAN EARTH ITSELF. Samples returned from the asteroid Bennu contain complex organic molecules including precursors to DNA and RNA, plus many of the amino acids used by all life on Earth. These molecules formed in the early solar system and survived for billions of years inside the asteroid. Earth didn’t have to invent the chemistry of life from nothing. It was delivered ready-made from space. Why this matters: • Bennu is a primitive asteroid that has remained largely unchanged since the birth of the solar system (~4.5 billion years ago) • The samples contain the molecular building blocks of DNA, RNA, and proteins the core components of life as we know it • These organics were preserved through the violent early days of the solar system and could have been delivered to Earth by asteroids and comets • This is some of the strongest direct evidence yet that life’s chemistry has cosmic origins The deeper implication: This doesn’t mean aliens or microbes came from space. It means the raw materials for life were already floating around the solar system long before Earth cooled enough to support life. Our planet likely received these ingredients from above rather than creating them all from scratch. If these building blocks were common in the early solar system, then the starting chemistry for life may have been widespread dramatically raising the chances that similar processes could have happened elsewhere. How does it change your perspective to know that the molecular ingredients for DNA were already present in space billions of years before the first living cell appeared on Earth? Follow for more discoveries about the origins of life and what we’re learning from asteroid samples.
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🚨 NASA JUST FOUND THE RAW INGREDIENTS OF DNA INSIDE A ROCK OLDER THAN EARTH ITSELF. Samples returned from the asteroid Bennu contain complex organic molecules including precursors to DNA and RNA, plus many of the amino acids used by all life on Earth. These molecules formed in the early solar system and survived for billions of years inside the asteroid. Earth didn’t have to invent the chemistry of life from nothing. It was delivered ready-made from space. Why this matters: • Bennu is a primitive asteroid that has remained largely unchanged since the birth of the solar system (~4.5 billion years ago) • The samples contain the molecular building blocks of DNA, RNA, and proteins the core components of life as we know it • These organics were preserved through the violent early days of the solar system and could have been delivered to Earth by asteroids and comets • This is some of the strongest direct evidence yet that life’s chemistry has cosmic origins The deeper implication: This doesn’t mean aliens or microbes came from space. It means the raw materials for life were already floating around the solar system long before Earth cooled enough to support life. Our planet likely received these ingredients from above rather than creating them all from scratch. If these building blocks were common in the early solar system, then the starting chemistry for life may have been widespread dramatically raising the chances that similar processes could have happened elsewhere. How does it change your perspective to know that the molecular ingredients for DNA were already present in space billions of years before the first living cell appeared on Earth? Follow for more discoveries about the origins of life and what we’re learning from asteroid samples.

TheNewPhysics

87,603 görüntüleme • 3 ay önce

🚨 MASSIVE ASTEROID ALERT 🚨 😱 5 ASTEROIDS TO STRIKE EARTH ON JANUARY 4! ⚠️On January 4, something unusual appeared on NASA’s tracking systems. Not one. Not two. But five separate space objects entered Earth’s monitored region of space — all on the same day. 🛰️ WHAT WAS DETECTED NASA’s Near-Earth Object monitoring network identified five asteroids moving at extreme speeds, each following its own calculated path around our planet. • Classified as Near-Earth Asteroids (NEAs) • Traveling at tens of thousands of km/h • Detected days in advance • Tracked continuously as they approached and passed. Their distances varied, but all were close enough to activate automatic observation protocols. 🔭 WHY THIS STOOD OUT Asteroids pass Earth often — but multiple objects on the same date always draw attention. Every trajectory was recalculated. Every data point rechecked. Ground-based telescopes and automated systems stayed locked in. No public countdown. No dramatic warning. Just silent monitoring. 🌑 WHAT THE SYSTEMS SAW • Stable orbits • No sudden course changes • No fragmentation • No interaction with Earth’s atmosphere. One by one, the objects passed Earth’s vicinity and moved back into deep space. 🌍 THE RESULT No impact. No damage. No visible sign in the sky. To most people, January 4 felt completely normal. But above our heads, space traffic moved quietly — and was watched closely. 🛰️ THE BIGGER PICTURE Earth travels through a solar system filled with ancient debris left over from planet formation. Most objects remain distant. Some pass close. A few demand attention. This was one of those moments. The universe didn’t slow down. Earth didn’t notice. NASA kept watching. 🌌 Five asteroids came and went. The planet remained untouched. And space moved on. #Asteroids #NASA #SpaceUpdate #NearEarthObjects #CosmicWatch #Astronomy #Universe
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🚨 MASSIVE ASTEROID ALERT 🚨 😱 5 ASTEROIDS TO STRIKE EARTH ON JANUARY 4! ⚠️On January 4, something unusual appeared on NASA’s tracking systems. Not one. Not two. But five separate space objects entered Earth’s monitored region of space — all on the same day. 🛰️ WHAT WAS DETECTED NASA’s Near-Earth Object monitoring network identified five asteroids moving at extreme speeds, each following its own calculated path around our planet. • Classified as Near-Earth Asteroids (NEAs) • Traveling at tens of thousands of km/h • Detected days in advance • Tracked continuously as they approached and passed. Their distances varied, but all were close enough to activate automatic observation protocols. 🔭 WHY THIS STOOD OUT Asteroids pass Earth often — but multiple objects on the same date always draw attention. Every trajectory was recalculated. Every data point rechecked. Ground-based telescopes and automated systems stayed locked in. No public countdown. No dramatic warning. Just silent monitoring. 🌑 WHAT THE SYSTEMS SAW • Stable orbits • No sudden course changes • No fragmentation • No interaction with Earth’s atmosphere. One by one, the objects passed Earth’s vicinity and moved back into deep space. 🌍 THE RESULT No impact. No damage. No visible sign in the sky. To most people, January 4 felt completely normal. But above our heads, space traffic moved quietly — and was watched closely. 🛰️ THE BIGGER PICTURE Earth travels through a solar system filled with ancient debris left over from planet formation. Most objects remain distant. Some pass close. A few demand attention. This was one of those moments. The universe didn’t slow down. Earth didn’t notice. NASA kept watching. 🌌 Five asteroids came and went. The planet remained untouched. And space moved on. #Asteroids #NASA #SpaceUpdate #NearEarthObjects #CosmicWatch #Astronomy #Universe

UNIVERSE Now

23,575 görüntüleme • 9 ay önce

🚨 THE “ALIEN COMET” MOMENT IS HERE — 3I/ATLAS PASSES EARTH NEXT WEEK 🚨 Something extraordinary from outside our solar system is quietly passing by. The interstellar object 3I/ATLAS will reach its closest point to Earth on December 19, 2025, and many headlines are struggling to explain what’s really happening. Here’s the simple truth: 3I/ATLAS is NOT coming toward Earth. Instead, Earth is moving closer to its path as we orbit the Sun. It’s like two cars on different lanes briefly coming closer — dramatic to watch, but completely safe. 3I/ATLAS has already traveled beyond Mars’ orbit and is now heading out of the solar system forever. There is no impact risk. Even at its closest, it will remain hundreds of millions of kilometers away. What makes this moment special isn’t danger — it’s rarity. This object came from another star system, passed through our cosmic neighborhood, and will never return again. This isn’t a warning. It’s a reminder that the universe is vast, mysterious, and full of visitors we’re only just beginning to understand. #3IATLAS #interstellarobject #3Iアトラス
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🚨 THE “ALIEN COMET” MOMENT IS HERE — 3I/ATLAS PASSES EARTH NEXT WEEK 🚨 Something extraordinary from outside our solar system is quietly passing by. The interstellar object 3I/ATLAS will reach its closest point to Earth on December 19, 2025, and many headlines are struggling to explain what’s really happening. Here’s the simple truth: 3I/ATLAS is NOT coming toward Earth. Instead, Earth is moving closer to its path as we orbit the Sun. It’s like two cars on different lanes briefly coming closer — dramatic to watch, but completely safe. 3I/ATLAS has already traveled beyond Mars’ orbit and is now heading out of the solar system forever. There is no impact risk. Even at its closest, it will remain hundreds of millions of kilometers away. What makes this moment special isn’t danger — it’s rarity. This object came from another star system, passed through our cosmic neighborhood, and will never return again. This isn’t a warning. It’s a reminder that the universe is vast, mysterious, and full of visitors we’re only just beginning to understand. #3IATLAS #interstellarobject #3Iアトラス

Night Sky Now

155,049 görüntüleme • 9 ay önce

Most of us grew up seeing simplified diagrams of the Hubble Space Telescope and assumed the James Webb Space Telescope follows a similar path around Earth. In reality, it operates in a very different region of space. It is not orbiting our planet in the traditional sense but instead travels around a point about 1.5 million kilometers away known as the Sun–Earth L2 point, keeping pace with Earth as both move around the Sun. This location is often described as a gravitational balance point, but it is not truly stable or neutral. JWST does not sit still there; it follows a controlled orbit around L2 and requires periodic adjustments to stay on course. The result is a delicate, engineered dance between gravity and motion, where the telescope remains aligned with Earth while staying far from its heat and light, allowing it to observe the universe with extraordinary clarity.
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Most of us grew up seeing simplified diagrams of the Hubble Space Telescope and assumed the James Webb Space Telescope follows a similar path around Earth. In reality, it operates in a very different region of space. It is not orbiting our planet in the traditional sense but instead travels around a point about 1.5 million kilometers away known as the Sun–Earth L2 point, keeping pace with Earth as both move around the Sun. This location is often described as a gravitational balance point, but it is not truly stable or neutral. JWST does not sit still there; it follows a controlled orbit around L2 and requires periodic adjustments to stay on course. The result is a delicate, engineered dance between gravity and motion, where the telescope remains aligned with Earth while staying far from its heat and light, allowing it to observe the universe with extraordinary clarity.

Cosmos Archive

31,985 görüntüleme • 5 ay önce

🚨 3I/ATLAS CLOSEST APPROACH IN 7 DAYS🚨 With the its closest position to Earth only 7 days away, the fear mongering engagement farming accounts are in full swing trying to profit from your discomfort. I see many of them saying that 3I/ATLAS is approaching Earth trying to create panic for views. The reality is that Earth is approaching 3I/ATLAS, not the other way around. We are only getting closer because our orbit is approaching the object from behind. 3I/ATLAS is already well beyond Mars orbit and headed out of the solar system. Earth is in no danger of an impact. I've included a video of the current trajectory to help illustrate this. Stay curious. #3IATLAS #3IATLASCOMET #STAYCURIOUS
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🚨 3I/ATLAS CLOSEST APPROACH IN 7 DAYS🚨 With the its closest position to Earth only 7 days away, the fear mongering engagement farming accounts are in full swing trying to profit from your discomfort. I see many of them saying that 3I/ATLAS is approaching Earth trying to create panic for views. The reality is that Earth is approaching 3I/ATLAS, not the other way around. We are only getting closer because our orbit is approaching the object from behind. 3I/ATLAS is already well beyond Mars orbit and headed out of the solar system. Earth is in no danger of an impact. I've included a video of the current trajectory to help illustrate this. Stay curious. #3IATLAS #3IATLASCOMET #STAYCURIOUS

Drew Doss

100,622 görüntüleme • 9 ay önce

What if a spacecraft could cycle between Earth and Moon orbits, performing multiple circuits of each, naturally and indefinitely, with zero propulsion? We’ve discovered a new class of stable, prograde, low-energy cycler orbits that do just that. Why these orbits matter: Ballistic → fuel-free Stable → long-term ready Near-chaotic → agile with low ΔV Low-energy → access to Earth/Moon, Lagrange points, Sun–Earth L1/L2, even heliocentric space At the AAS/AIAA Astrodynamics Specialist Conference in Boston next week, I’ll present on a new family of ballistic Earth-Moon cycler orbits that are stable, prograde, and mission agile—unlike any cyclers in the current literature. The example below is shown in both the Earth-Moon rotating frame and inertial frame. Conference Paper:
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What if a spacecraft could cycle between Earth and Moon orbits, performing multiple circuits of each, naturally and indefinitely, with zero propulsion? We’ve discovered a new class of stable, prograde, low-energy cycler orbits that do just that. Why these orbits matter: Ballistic → fuel-free Stable → long-term ready Near-chaotic → agile with low ΔV Low-energy → access to Earth/Moon, Lagrange points, Sun–Earth L1/L2, even heliocentric space At the AAS/AIAA Astrodynamics Specialist Conference in Boston next week, I’ll present on a new family of ballistic Earth-Moon cycler orbits that are stable, prograde, and mission agile—unlike any cyclers in the current literature. The example below is shown in both the Earth-Moon rotating frame and inertial frame. Conference Paper:

Shane Ross

632,214 görüntüleme • 1 yıl önce

I want to believe, but there's too much evidence that not only tells me but shows me that they lied. I feel like low Earth orbit is as far as we can go... 1. The van Allen radiation belt. 2. The disgusted, unexciting, ashamed post moon landing conference with the three astronauts. Their body language, mannerisms, and answers scream that they're lying. 3. The lack of noise of the jet engines in the "videos." 4. How did they get the lunar rover on the spaceship? 5. No craters or dust underneath the spaceship. 6. How did the film the spaceship take off perfectly if nobody was left on the moon to operate the camera, and how was it so perfect if there was a delay? 7. The rockets and the spaceship look like a model. 8. The video of them saying that they are 130,000 miles away from Earth when all they really did was cover up the windows when they are in low earth orbit and film a small portion of Earth from low Earth orbit to simulate that they were far away, but then you find out that they're only in low Earth orbit when they uncover the windows. (Shown in the video below) 9. How we have to redesign the space suits to be able to handle the atmosphere on the moon. 10. The lack of talk and missions to the moon ever since. 11. The numerous blacked out photos from NASA. 12. How an older smartphone has way more technology than the entire spaceship back in 1969, and how we were able to even communicate with them in the spaceship as the one astronaut who passed away before the moon launch specified that they had trouble communicating between buildings and the shuttle on the ground. 13. Not one single astronaut would put their hand on the Bible and say they went to the moon. Why? 14. All the CGI and bubbles caught on NASA videos. 15. All the green screen captures and astronauts on wires in the "shuttle" and on the "ISS." There are so many bloopers and outtakes of astronauts and shuttle hatches malfunctioning, people appearing in the background of videos of the shuttle, people fading in and out, I could go on forever... How would you convince me against the evidence or prove me wrong from the arguments that I have provided?
0:18

I want to believe, but there's too much evidence that not only tells me but shows me that they lied. I feel like low Earth orbit is as far as we can go... 1. The van Allen radiation belt. 2. The disgusted, unexciting, ashamed post moon landing conference with the three astronauts. Their body language, mannerisms, and answers scream that they're lying. 3. The lack of noise of the jet engines in the "videos." 4. How did they get the lunar rover on the spaceship? 5. No craters or dust underneath the spaceship. 6. How did the film the spaceship take off perfectly if nobody was left on the moon to operate the camera, and how was it so perfect if there was a delay? 7. The rockets and the spaceship look like a model. 8. The video of them saying that they are 130,000 miles away from Earth when all they really did was cover up the windows when they are in low earth orbit and film a small portion of Earth from low Earth orbit to simulate that they were far away, but then you find out that they're only in low Earth orbit when they uncover the windows. (Shown in the video below) 9. How we have to redesign the space suits to be able to handle the atmosphere on the moon. 10. The lack of talk and missions to the moon ever since. 11. The numerous blacked out photos from NASA. 12. How an older smartphone has way more technology than the entire spaceship back in 1969, and how we were able to even communicate with them in the spaceship as the one astronaut who passed away before the moon launch specified that they had trouble communicating between buildings and the shuttle on the ground. 13. Not one single astronaut would put their hand on the Bible and say they went to the moon. Why? 14. All the CGI and bubbles caught on NASA videos. 15. All the green screen captures and astronauts on wires in the "shuttle" and on the "ISS." There are so many bloopers and outtakes of astronauts and shuttle hatches malfunctioning, people appearing in the background of videos of the shuttle, people fading in and out, I could go on forever... How would you convince me against the evidence or prove me wrong from the arguments that I have provided?

The SCIF

32,813 görüntüleme • 1 yıl önce

Space objects such as meteoroids and asteroids move across the solar system and can collide with both Earth and the Moon. However, the Moon shows far more visible impact marks on its surface. One main reason is that Earth has a thick atmosphere that protects the planet. When many meteoroids enter Earth’s atmosphere, they burn up due to friction before they can reach the ground. This process creates the bright streaks of light we call shooting stars. The Moon, however, has almost no atmosphere, so incoming space rocks are not slowed down or burned up. They travel directly to the lunar surface and strike it at very high speed. Each collision creates an impact crater, throwing dust and rocks outward from the impact point. Over billions of years, thousands of these impacts have covered the Moon with craters. Unlike Earth, the Moon also has no wind, water, or weather to erase these craters, so they remain visible for millions or even billions of years. This is why the Moon looks heavily cratered when we observe it from Earth through telescopes.
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Space objects such as meteoroids and asteroids move across the solar system and can collide with both Earth and the Moon. However, the Moon shows far more visible impact marks on its surface. One main reason is that Earth has a thick atmosphere that protects the planet. When many meteoroids enter Earth’s atmosphere, they burn up due to friction before they can reach the ground. This process creates the bright streaks of light we call shooting stars. The Moon, however, has almost no atmosphere, so incoming space rocks are not slowed down or burned up. They travel directly to the lunar surface and strike it at very high speed. Each collision creates an impact crater, throwing dust and rocks outward from the impact point. Over billions of years, thousands of these impacts have covered the Moon with craters. Unlike Earth, the Moon also has no wind, water, or weather to erase these craters, so they remain visible for millions or even billions of years. This is why the Moon looks heavily cratered when we observe it from Earth through telescopes.

The Astronomy Guy

17,500 görüntüleme • 6 ay önce

Nigeria has announced the discovery of massive reserves estimated at 3.3 million tons of lithium, along with rare earth metals, gold, nickel, copper, and platinum group metals—a discovery that could bolster its position in the global strategic minerals market. On social media, some commentators sarcastically suggested that the West's next step in plundering these reserves might be to promote the "need for freedom and democracy."
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Nigeria has announced the discovery of massive reserves estimated at 3.3 million tons of lithium, along with rare earth metals, gold, nickel, copper, and platinum group metals—a discovery that could bolster its position in the global strategic minerals market. On social media, some commentators sarcastically suggested that the West's next step in plundering these reserves might be to promote the "need for freedom and democracy."

China pulse 🇨🇳

12,580 görüntüleme • 3 ay önce

When a spacecraft leaves Earth, it doesn’t just fire its engines and head straight to its destination. In many missions, especially those going beyond low Earth orbit, there’s a more subtle and elegant strategy at play, one that uses gravity itself as part of the navigation system. This is often called a gravity assist, or a slingshot maneuver. But in the case of missions like #Artemis II, what’s being used is a closely related idea known as a free-return trajectory. At first glance, it might sound simple: the spacecraft goes to the Moon, loops around it, and comes back. But the physics behind it is anything but simple. Instead of relying on continuous propulsion, the spacecraft follows a carefully calculated path through the gravitational field of the Earth–Moon system. It is launched with just the right speed and direction so that, as it approaches the Moon, the Moon’s gravity bends its trajectory. The spacecraft is effectively flung around the Moon, redirected onto a path that naturally brings it back toward Earth. No major engine burn is needed for the return. Small trajectory corrections may still be required, but gravity does the heavy lifting. That’s the key. This kind of trajectory is not just efficient, it’s also safe. If something goes wrong with the spacecraft’s engines or onboard systems, gravity itself ensures the return. It’s an inherent backup plan, built into the trajectory from the very beginning. The same fundamental idea appears in gravity assists used across the Solar System. When a spacecraft flies past a planet, it can gain or lose speed by exchanging momentum with that planet. From the spacecraft’s point of view, it’s as if it has been accelerated without using fuel. In reality, it has borrowed a tiny amount of orbital energy from the planet itself. That’s how missions like Voyager reached the outer planets, and how probes continue to explore regions far beyond what their onboard fuel alone would allow. But there’s an important distinction. An interplanetary gravity assist is typically used to change speed and direction, often increasing the spacecraft’s energy. A free-return trajectory, like the one used in Artemis II, is designed for something more specific: a path that naturally loops back to Earth without requiring additional propulsion. It’s less about gaining energy, and more about shaping a trajectory that guarantees a return. To understand why this works, it helps to stop thinking in straight lines. In space, motion follows curves defined by gravity. The spacecraft is constantly falling, first toward Earth, then toward the Moon, and then back toward Earth again. What looks like a loop is really a continuous free fall through a changing gravitational landscape. This way of navigating space reveals something deeper. We tend to think of engines as the drivers of motion, but once a spacecraft is on its way, gravity does most of the work. The art of spaceflight is not just about thrust. It’s about knowing when not to use it. #GoodLuck #Artemis NASA Artemis
0:11

When a spacecraft leaves Earth, it doesn’t just fire its engines and head straight to its destination. In many missions, especially those going beyond low Earth orbit, there’s a more subtle and elegant strategy at play, one that uses gravity itself as part of the navigation system. This is often called a gravity assist, or a slingshot maneuver. But in the case of missions like #Artemis II, what’s being used is a closely related idea known as a free-return trajectory. At first glance, it might sound simple: the spacecraft goes to the Moon, loops around it, and comes back. But the physics behind it is anything but simple. Instead of relying on continuous propulsion, the spacecraft follows a carefully calculated path through the gravitational field of the Earth–Moon system. It is launched with just the right speed and direction so that, as it approaches the Moon, the Moon’s gravity bends its trajectory. The spacecraft is effectively flung around the Moon, redirected onto a path that naturally brings it back toward Earth. No major engine burn is needed for the return. Small trajectory corrections may still be required, but gravity does the heavy lifting. That’s the key. This kind of trajectory is not just efficient, it’s also safe. If something goes wrong with the spacecraft’s engines or onboard systems, gravity itself ensures the return. It’s an inherent backup plan, built into the trajectory from the very beginning. The same fundamental idea appears in gravity assists used across the Solar System. When a spacecraft flies past a planet, it can gain or lose speed by exchanging momentum with that planet. From the spacecraft’s point of view, it’s as if it has been accelerated without using fuel. In reality, it has borrowed a tiny amount of orbital energy from the planet itself. That’s how missions like Voyager reached the outer planets, and how probes continue to explore regions far beyond what their onboard fuel alone would allow. But there’s an important distinction. An interplanetary gravity assist is typically used to change speed and direction, often increasing the spacecraft’s energy. A free-return trajectory, like the one used in Artemis II, is designed for something more specific: a path that naturally loops back to Earth without requiring additional propulsion. It’s less about gaining energy, and more about shaping a trajectory that guarantees a return. To understand why this works, it helps to stop thinking in straight lines. In space, motion follows curves defined by gravity. The spacecraft is constantly falling, first toward Earth, then toward the Moon, and then back toward Earth again. What looks like a loop is really a continuous free fall through a changing gravitational landscape. This way of navigating space reveals something deeper. We tend to think of engines as the drivers of motion, but once a spacecraft is on its way, gravity does most of the work. The art of spaceflight is not just about thrust. It’s about knowing when not to use it. #GoodLuck #Artemis NASA Artemis

Erika 

235,152 görüntüleme • 6 ay önce

If you travel at a very high speed, time for you will pass much more slowly compared to other people. This is not just a theoretical concept. This effect has already been experimentally measured. In 1971, physicists Joseph Hafele and Richard Keating used Cesium atomic clocks to test this. They placed some atomic clocks on commercial airplanes and flew them around the world, while other identical clocks were kept on Earth as references. The flights were made both eastward and westward. Cesium atomic clocks were used here because the expected time difference was extremely small. To accurately measure this tiny difference, they needed clocks that could measure time with extremely high precision. When the airplanes completed their journeys and returned, the Cesium atomic clocks on the airplanes were compared with the clocks on Earth. The clocks did not record exactly the same amount of elapsed time. The eastward flight clock showed slightly less elapsed time compared to the ground clock. In other words, slightly less time had passed for the clock that had traveled on the airplane compared to the clock that remained on Earth. And this is what makes the whole concept so interesting. This effect is explained by Einstein's theories of relativity. The time dilation caused by speed comes from Einstein's Special Relativity, while the Hafele-Keating experiment also involved the effect of gravity. According to Special Relativity, when an object moves at a very high speed, time passes more slowly for it compared to a relatively stationary observer. This is called Time Dilation. Now, let's understand this with an example. Suppose you are 20 years old and you travel in a spacecraft at around 99.9% of the speed of light. If, according to the spacecraft's own clock, you travel through space for 10 years, only 10 years will have passed for you. So when you return to Earth, you will be about 30 years old. But on Earth, about 224 years will have passed. This means that time is not something that necessarily passes at exactly the same rate for every observer. As your speed becomes more extreme, the difference in elapsed time between you and a relatively stationary observer can become much larger. In other words, theoretically, if you could travel extremely close to the speed of light, you could experience only a few years yourself while hundreds of years pass on Earth. And that is what makes Einstein's theory of relativity so mind-blowing.
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If you travel at a very high speed, time for you will pass much more slowly compared to other people. This is not just a theoretical concept. This effect has already been experimentally measured. In 1971, physicists Joseph Hafele and Richard Keating used Cesium atomic clocks to test this. They placed some atomic clocks on commercial airplanes and flew them around the world, while other identical clocks were kept on Earth as references. The flights were made both eastward and westward. Cesium atomic clocks were used here because the expected time difference was extremely small. To accurately measure this tiny difference, they needed clocks that could measure time with extremely high precision. When the airplanes completed their journeys and returned, the Cesium atomic clocks on the airplanes were compared with the clocks on Earth. The clocks did not record exactly the same amount of elapsed time. The eastward flight clock showed slightly less elapsed time compared to the ground clock. In other words, slightly less time had passed for the clock that had traveled on the airplane compared to the clock that remained on Earth. And this is what makes the whole concept so interesting. This effect is explained by Einstein's theories of relativity. The time dilation caused by speed comes from Einstein's Special Relativity, while the Hafele-Keating experiment also involved the effect of gravity. According to Special Relativity, when an object moves at a very high speed, time passes more slowly for it compared to a relatively stationary observer. This is called Time Dilation. Now, let's understand this with an example. Suppose you are 20 years old and you travel in a spacecraft at around 99.9% of the speed of light. If, according to the spacecraft's own clock, you travel through space for 10 years, only 10 years will have passed for you. So when you return to Earth, you will be about 30 years old. But on Earth, about 224 years will have passed. This means that time is not something that necessarily passes at exactly the same rate for every observer. As your speed becomes more extreme, the difference in elapsed time between you and a relatively stationary observer can become much larger. In other words, theoretically, if you could travel extremely close to the speed of light, you could experience only a few years yourself while hundreds of years pass on Earth. And that is what makes Einstein's theory of relativity so mind-blowing.

The Curious Mind

10,054 görüntüleme • 28 gün önce

🚨 CHINA IS RACING TO BUILD A SPACE SOLAR POWER PLANT THAT COULD BEAM ELECTRICITY FROM ORBIT TO EARTH. Scientists at Xidian University have successfully tested a ground-based system that can wirelessly transmit kilowatt-level power over 100 meters using microwaves. Their ultimate goal is far more ambitious: placing large solar power stations in geostationary orbit (36,000 km up), where sunlight is available 24/7 with no weather or atmosphere blocking it. The project, called Zhuri (“chasing the sun”), uses mirrors to concentrate sunlight onto solar panels, converts the electricity into microwaves, and beams it down to a receiving antenna (rectenna) on Earth. Why this matters: • In space, solar energy is up to 6 times more efficient than on Earth because there’s no night, clouds, or atmospheric filtering • A single large space solar station could theoretically generate gigawatts of continuous clean power enough for millions of homes • The team has already proven the system can beam power to multiple moving targets at once • China is now among the world leaders in this technology, alongside the US and Japan The deeper implication: Space-based solar power has been a dream for decades because it could provide truly baseload renewable energy. While the technical and financial challenges are enormous (building massive structures in orbit, precise microwave beaming, and safety), steady progress like this brings the concept closer to reality. If successful, it could fundamentally change how humanity generates and distributes energy moving power collection off the planet entirely. Near-term applications could include wirelessly charging satellites or powering future lunar bases. Do you think space-based solar power will become a major energy source in the coming decades, or will it stay too expensive and complex? Follow for more frontier energy and space technology developments.
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🚨 CHINA IS RACING TO BUILD A SPACE SOLAR POWER PLANT THAT COULD BEAM ELECTRICITY FROM ORBIT TO EARTH. Scientists at Xidian University have successfully tested a ground-based system that can wirelessly transmit kilowatt-level power over 100 meters using microwaves. Their ultimate goal is far more ambitious: placing large solar power stations in geostationary orbit (36,000 km up), where sunlight is available 24/7 with no weather or atmosphere blocking it. The project, called Zhuri (“chasing the sun”), uses mirrors to concentrate sunlight onto solar panels, converts the electricity into microwaves, and beams it down to a receiving antenna (rectenna) on Earth. Why this matters: • In space, solar energy is up to 6 times more efficient than on Earth because there’s no night, clouds, or atmospheric filtering • A single large space solar station could theoretically generate gigawatts of continuous clean power enough for millions of homes • The team has already proven the system can beam power to multiple moving targets at once • China is now among the world leaders in this technology, alongside the US and Japan The deeper implication: Space-based solar power has been a dream for decades because it could provide truly baseload renewable energy. While the technical and financial challenges are enormous (building massive structures in orbit, precise microwave beaming, and safety), steady progress like this brings the concept closer to reality. If successful, it could fundamentally change how humanity generates and distributes energy moving power collection off the planet entirely. Near-term applications could include wirelessly charging satellites or powering future lunar bases. Do you think space-based solar power will become a major energy source in the coming decades, or will it stay too expensive and complex? Follow for more frontier energy and space technology developments.

TheNewPhysics

15,361 görüntüleme • 3 ay önce