APOPHIS 2029: The ASTEROID That Will Fly CLOSER Than SATELLITES

Añadido: 2026-05-16

[00:00:11]On Friday, April 13th, 2029, the night sky will give us a spectacle unseen in recorded human history.

[00:00:20]A point of light, bright and fast, will cross the sky visible to the naked eye.

[00:00:25]It won't be a shooting star, but a 340-m wide mountain of space rock named Apophis, and it will pass so close to Earth that it will cross the orbit of our own telecommunications satellites.

[00:00:36]But to understand why the scientific community will be holding its breath that night, we have to go back more than two decades.

[00:00:44]To the moment this object made us believe the end was near.

[00:00:51]At first, it was just a faint dot in the data, temporarily named 2004 MN4.

[00:00:57]It was discovered on June 19th, 2004, by a team of three astronomers scanning the skies at the Kitt Peak National Observatory in Arizona.

[00:01:07]For a few nights, they watched this tiny speck of light move against the backdrop of stars.

[00:01:12]But then, bad weather and technical issues rolled in.

[00:01:16]The observatory lost sight of the object.

[00:01:19]For 6 months, 2004 MN4 was a ghost, wandering unseen in the vastness of the solar system.

[00:01:27]But as its trajectory calculations were refined, scientific curiosity turned into a silent alarm.

[00:01:34]In December 2004, a different team in Australia rediscovered the asteroid.

[00:01:39]This time, they had enough data to calculate its path, and the mathematical models yielded a chilling fact.

[00:01:46]Right around Christmas of that year, the situation escalated dramatically. The initial calculations suggested a one in 200 chance of impact. Days later, it jumped to 1 in 62. Then, it peaked at a staggering 2.7% chance that this asteroid would impact Earth exactly on Friday, April 13th, 2029.

[00:02:10]To put that into perspective, that is a 1 in 37 chance of a direct hit.

[00:02:15]It might sound like little, but astronomically, 2.7% is a giant red alert. Most near-Earth objects have impact probabilities of 1 in a million.

[00:02:26]Apophis became the first and only asteroid in history to reach level 4 on the Torino scale, the metric scientists use to measure space danger.

[00:02:36]To understand the gravity of this, level 1 is a routine discovery.

[00:02:41]Level 4 means probability of collision capable of causing regional devastation.

[00:02:46]Headlines exploded around the globe.

[00:02:49]News networks ran simulations of the apocalypse, and the world watched in disbelief as scientists scrambled for answers.

[00:02:57]That was when it received its official name, Apophis, the ancient Egyptian serpent god of chaos and darkness, whose sole purpose was to swallow the sun. It was a fitting title.

[00:03:08]If a rock of that size fell, it would strike the atmosphere at over 30 km per second and release the energy of dozens of nuclear bombs.

[00:03:17]Fortunately, science works fast.

[00:03:20]In early 2005, researchers frantically searched for older, forgotten images of the night sky, a process known as precovery. They found faint traces of Apophis in photographs taken months before its official discovery. By adding these hidden data points, astronomers mapped its orbit with much greater precision.

[00:03:40]The verdict was a global relief. The probability of impact in 2029 was reduced to zero.

[00:03:47]However, the relief was short-lived.

[00:03:50]Scientists realized that if Apophis passed through a very specific 600-m wide region of space in 2029 as a gravitational keyhole Earth's gravity would alter its path just enough to guarantee a direct hit 7 years later in 2036. It took years of intense tracking and radar observation to finally close that keyhole.

[00:04:12]They eventually ruled out possible collisions in 2036 and 2068 today.

[00:04:18]We know we are safe.

[00:04:20]But the fear of Apophis sowed in 2004 forever changed how we monitor space, triggering a massive global investment in planetary defense. And now that same god of chaos is coming to pay us a visit just 32,000 km above our heads.

[00:04:40]Let's fast forward to April 13th, 2029.

[00:04:43]And yes, it's a Friday the 13th for astronomers and stargazers around the globe. This date has been circled on calendars for a quarter of a century. Even though the probability of impact is zero.

[00:04:57]What will happen that night defies everything we know about the safety of our orbital neighborhood.

[00:05:03]We are about to witness a cosmic near miss so rare that calculations suggest an asteroid of this size comes this close to Earth only once every 7,500 years.

[00:05:14]To understand the magnitude of this event, we need to talk about distances.

[00:05:19]Space is famously empty and our intuition for scale often fails us.

[00:05:25]The moon, our closest neighbor, orbits at about 384,000 km away.

[00:05:31]It's a long journey.

[00:05:32]It took the Apollo astronauts three full days traveling at thousands of kilometers per hour to cross that void.

[00:05:39]But Apophis won't stay that far away.

[00:05:42]This colossal rock will come within 31,860 km of the Earth's surface.

[00:05:49]It's a hard number to process, so let's put it into perspective. If the Earth were the size of a basketball, Apophis would pass less than an inch from the surface. It will graze our planet at a tenth of the distance that separates us from the moon. It is stepping right into our celestial backyard. But here is the real problem.

[00:06:09]At about 35,800 km high lies the geosynchronous orbit ring.

[00:06:15]This is a very specific altitude where the orbital speed of a satellite perfectly matches the rotation of the Earth, allowing it to stay parked over one specific spot on the ground.

[00:06:26]This is where hundreds of our weather, communications, and defense satellites operate.

[00:06:31]They are the invisible backbone of our modern global infrastructure.

[00:06:35]Apophis is going to pass underneath this ring of satellites. It's like rolling a bowling ball through rush hour highway traffic, hoping it doesn't hit any cars.

[00:06:46]The asteroid will cross this critical zone, known as the Clark Belt, in a matter of minutes. It will be plunging right through the most crowded orbital highway humanity has ever built.

[00:06:57]Although space is vast and the probability of a direct hit with a satellite is minimal, operators around the world will be monitoring every second.

[00:07:06]An impact at that speed wouldn't just destroy a satellite. It would create a chain reaction cloud of debris.

[00:07:13]This terrifying scenario, known as the Kessler syndrome, could potentially turn the orbital ring into a shrapnel minefield, knocking out vital communication networks. But the satellite's orbit isn't the only protagonist tonight.

[00:07:27]The Earth itself will play a crucial role.

[00:07:30]The visual show from the ground will be absolutely unprecedented. Apophis' visible journey will begin over the southern hemisphere.

[00:07:39]It will first appear as a bright dot to the naked eye in the night sky over the Indian Ocean.

[00:07:45]It won't look like an airplane, and it won't streak across the sky in a blinding flash like a meteor. Instead, it will look like a bright star that has mysteriously broken free from its constellation.

[00:07:57]It will move fast.

[00:07:59]Very fast. While stars take hours to cross the sky, Apophis will traverse the width of the full moon in less than a minute. For observers in Australia, it will cross the sky during the early evening hours.

[00:08:12]Millions of people will be able to step outside, look up, and track its movement without the need for telescopes or binoculars.

[00:08:20]Then, it will continue its journey westward.

[00:08:23]Passing directly over Africa right at its closest point. When it's over the Atlantic Ocean, something invisible but extremely violent will happen.

[00:08:32]Earth's gravity will grab the asteroid.

[00:08:35]Passing less than 32,000 km away, our planet's immense gravitational pull will act as a giant brake and a slingshot at the same time.

[00:08:44]The raw mechanics of the solar system will be on full display.

[00:08:48]This gravitational tug will be so strong that it will literally bend the asteroid's orbital trajectory.

[00:08:54]It will enter the Earth system with one orbit and be ejected back into deep space with a completely different one.

[00:09:00]Earth will permanently alter the destiny of this rock, but the effects don't end there.

[00:09:05]Scientists believe Earth's gravity will physically twist the asteroid.

[00:09:10]Apophis is not a solid, monolithic chunk of metal.

[00:09:14]It is likely a rubble pile, a collection of boulders, rocks, and dust held together by its own weak gravity.

[00:09:22]When it gets this close, the gravitational pull on the side of the asteroid facing Earth will be significantly stronger than the pull on its far side.

[00:09:30]Tidal forces may cause asteroid quakes or astroquakes. The entire structure of the asteroid will groan and shift under the immense stress.

[00:09:39]Apophis' surface, likely composed of loose rocks and rubble, could shift exposing material from its interior that hasn't seen sunlight in billions of years. We might witness massive surface avalanches in zero-gravity, a phenomenon never before observed in real time.

[00:09:57]It could even alter its rotation speed, causing it to spin erratically as it moves away. It will tumble through the void, forever scarred and reshaped by its brief encounter with our world.

[00:10:09]Finally, the asteroid will cross the East Coast of the United States.

[00:10:13]By the time it gets there, it will already be starting to pull away from Earth, losing brightness as it heads back into cold space.

[00:10:22]This entire event, from the moment it becomes visible to the naked eye until it fades back into the darkness, will last only a few hours, a mere sigh on a cosmic scale.

[00:10:33]But what scientists will learn in those hours of intense observation, as Apophis tears through our orbital space, will rewrite the planetary defense manuals.

[00:10:42]It is a free, spectacular rehearsal for the day a rock of this size actually has our name on it.

[00:10:54]What would have happened if that 2.7% impact probability, calculated in 2004, had become an absolute certainty?

[00:11:03]What would the end of our normalcy look like?

[00:11:05]To understand the level of destruction, we must look at its numbers.

[00:11:09]Apophis is not a world destroyer like the one that wiped out the dinosaurs.

[00:11:14]That one measured about 10 km.

[00:11:17]Apophis measures only 340 m, but don't be fooled by the size difference.

[00:11:23]With an estimated weight of 27 million tons and traveling at more than 30 km per second, the kinetic energy Apophis carries with it is almost incomprehensible. If it entered our atmosphere, there would be no long dramatic countdown in the sky.

[00:11:39]Just a blinding flash, much brighter than the sun, tearing through the stratosphere in a matter of seconds.

[00:11:46]The immense atmospheric pressure in front of the asteroid would create a devastating shockwave before it even touched the surface.

[00:11:54]And then, the impact. If Apophis hit dry land, it would release an energy equivalent to 1,200 megatons of TNT.

[00:12:03]To put it in perspective, this is about 60 times more powerful than the Tsar Bomba, the largest nuclear weapon ever detonated in human history.

[00:12:13]At ground zero, the temperature would reach thousands of degrees in a fraction of a second. Rock, earth, steel, and any form of life would instantly vaporize.

[00:12:23]It would leave a scar on the planet, a glowing crater over 5 km in diameter and half a kilometer deep. But the crater would be the least of the problems.

[00:12:34]Everything within a 150 km radius would be wiped off the map by a supersonic blast wave. Reinforced concrete buildings would crumble like salt biscuits, and hurricane force winds of fire would uproot trees hundreds of kilometers around. However, the earth is 71% water.

[00:12:52]Math dictates that in this catastrophic scenario, it would most likely fall into the ocean. And that scenario is no better.

[00:13:02]A deep water impact wouldn't leave a permanent visible crater, but the energy transfer would displace billions of tons of water in an instant.

[00:13:11]At first, in the open sea, the wave might not seem that imposing.

[00:13:16]But as that immense energy traveled towards the continental coasts and the seafloor rose, the water would stack on top of itself.

[00:13:23]Walls of water tens of meters high would strike the coastlines. Entire cities, ports, and critical infrastructure would be submerged under an unstoppable crushing force.

[00:13:34]And then would come the secondary impact, the one that affects the entire planet, the atmosphere. Whether falling on land or in the sea, the explosion would inject millions of tons of dust, pulverized rock, or water vapor directly into the stratosphere.

[00:13:51]These aerosols would spread rapidly, thanks to global winds, enveloping large areas of the affected hemisphere and blocking sunlight for months.

[00:14:00]We would enter what is known as an impact winter. Global temperatures would drop. Crops would fail on a continental level.

[00:14:08]And with that, the network that sustains our modern world would collapse.

[00:14:13]The global supply chain would break.

[00:14:15]Telecommunications would fail, and the global economy would regress decades in a single day.

[00:14:22]It wouldn't be the end of humanity.

[00:14:24]Our species would survive on the margins, but it would be the definitive end of civilization as we know it.

[00:14:31]This is the abyss we briefly peered into in 2004, the scenario we escaped.

[00:14:38]That is why, when Apophis crosses our sky in 2029, it won't just be a cosmic wonder. It will be a monumental reminder of the cosmic lottery in which we live, and from which, this time, we emerged winners.

[00:14:56]If the catastrophic scenario we just talked about became a reality, what would we do?

[00:15:01]If we discovered that Apophis, or any other giant rock, was heading straight toward us, how would we defend the planet?

[00:15:08]The answer isn't in Hollywood, but in orbital physics.

[00:15:12]And the goal isn't to destroy the asteroid, but to push it.

[00:15:16]We only need to change its speed by 1 mm per second years before the impact, so that it misses by millions of kilometers.

[00:15:24]To achieve this, space agencies have four cards on the table.

[00:15:29]The first is the most elegant, the gravity tractor.

[00:15:32]It consists of sending a massive spacecraft and parking it right next to the asteroid without touching it.

[00:15:39]Over the course of years, the ship's minuscule gravity would gently pull the rock, diverting it from its deadly course.

[00:15:47]The second option is laser ablation.

[00:15:50]Imagine a swarm of satellites focusing high-power lasers on one side of the asteroid.

[00:15:55]The extreme heat would vaporize the rock, creating a jet of gas that would act like a rocket thruster, pushing the asteroid in the opposite direction.

[00:16:04]The third option is the most famous and dangerous, nuclear detonation. But it's not like in the movies.

[00:16:11]We wouldn't drill into the asteroid to blow it up from the inside, as that would create a cosmic shotgun of radioactive fragments raining down on Earth. Instead, we would detonate the bomb several meters above the surface.

[00:16:25]The immense, instantaneous radiation would burn one side of the rock, generating the same propulsion effect as the lasers, but with brutal force.

[00:16:34]However, there is a fourth option, pure mechanical brute force, the kinetic impactor.

[00:16:41]It simply consists of building a very heavy projectile and crashing it into the asteroid at mind-boggling speeds, using the sheer energy of the crash to alter its trajectory. And we know this option works because we already put it to the test.

[00:16:58]On September 26th, 2022, humanity stopped being a mere passenger in the solar system and for the first time took the wheel.

[00:17:07]The mission was called DART, Double Asteroid Redirection Test. The target wasn't a purpose, but a binary system 11 million kilometers away.

[00:17:17]NASA targeted Dimorphos, a small moon, 160 m in diameter, roughly half the size of Apophis that orbited a larger asteroid named Didymos.

[00:17:29]Dimorphos posed no threat to Earth.

[00:17:32]It was simply the perfect guinea pig.

[00:17:34]The DART spacecraft, the size of a golf cart and weighing 570 kilos, traveled through space at the astonishing speed of 22,500 km/h.

[00:17:45]In the last minutes of its life, the spacecraft transmitted images to Earth at one frame per second. We saw the asteroid go from a blurry pixel in the dark to a detailed field of rocks filling the entire screen. And then, static. The signal cut out.

[00:18:02]DART had hit the exact target.

[00:18:04]It disintegrated instantly, releasing the energy of 3 tons of explosives.

[00:18:09]Days later, telescopes on Earth and in space confirmed the result.

[00:18:14]Before the impact, Dimorphos took 11 hours and 55 minutes to orbit its older brother.

[00:18:20]After the impact, its orbit had been reduced to 11 hours and 23 minutes.

[00:18:25]DART had shaved 32 minutes off its translation. It was an absolute success that exceeded NASA's most optimistic models by more than 25 times.

[00:18:36]The impact kicked up a debris tail thousands of kilometers long, temporarily turning the asteroid into an artificial comet.

[00:18:45]The DART mission proved something fundamental to our survival as a species. We are no longer at the mercy of the cosmic lottery. If Apophis or any other god of chaos ever threatens to end our story, we already have the instruction manual to strike back.

[00:19:05]That night in April 2029, when Apophis crosses the darkness above us, it will represent much more than a simple astronomical event or a mathematical rarity.

[00:19:16]It will be the closing of a cycle.

[00:19:18]A story that began with a profound fear of the unknown in 2004 and will culminate in scientific wonder.

[00:19:25]Throughout the history of this planet, countless species looked up in total helplessness against the whims of the universe.

[00:19:32]The dinosaurs didn't have a space program. We do.

[00:19:36]The passage of this immense mountain of rock just 32,000 km away is no longer a threat.

[00:19:43]It is a triumph.

[00:19:44]A triumph of international collaboration, of next-generation telescopes, and of brilliant minds calculating our safety.

[00:19:53]Apophis has lost its title as the god of chaos.

[00:19:56]Today, it is simply a monumental reminder of how far we have come as a species. Where will you be on Friday, April 13th, 2029?

[00:20:06]Will you go out and look up to try to catch that point of light crossing the stars? Leave me your answer in the comments.

[00:20:13]I read all the messages and I would love to know what you would do that night. If you found this journey fascinating and it brought you value, support the video by leaving a like.

[00:20:23]Don't forget to subscribe and activate the notification bell so you don't miss the next investigations and recreations.

[00:20:30]Thank you for joining me at the end.

[00:20:33]See you in the next video.