For a brief moment in 2004, a newly discovered asteroid named after the Egyptian god of chaos carried a genuine, if small, probability of ending civilization as we know it. Over two decades of patient observation, humanity's instruments refined the picture until the threat dissolved entirely — not because the danger was never real, but because knowledge, accumulated carefully, has a way of replacing fear with clarity. On April 13, 2029, the asteroid Apophis will pass closer to Earth than the satellites that carry our phone calls, visible to billions of people across three continents, arriving
NASA Rules Out Apophis Impact: 'Doomsday Asteroid' to Pass Earth Safely in 2029
A cosmic visitor, close enough to see, far enough to be safe.
Mark
Why did the early calculations get it so wrong? A 2.7 percent chance seems like they should have known better.
Mimi
They didn't have much to work with. In 2004, astronomers had just spotted this thing. Imagine trying to predict where a car will be in twenty-five years based on seeing it once on a highway. As more telescopes pointed at Apophis, the data improved. The odds didn't collapse because the asteroid changed course—it was always going to miss us. We just got better at reading the map.
Mark
So the close approach in 2029—is that actually dangerous, or is it just close by space standards?
Mimi
It's genuinely close. Closer than satellites we rely on every day. But the orbits don't intersect. It's like two trains on parallel tracks that come within sight of each other but never collide. The real danger would have been if we didn't know where it was going. Now we do.
Mark
What's the scientific value of it passing so close?
Mimi
Earth's gravity will literally squeeze the asteroid. It might trigger quakes on the surface, cause landslides. Scientists get to watch that happen in real time. NASA and the European Space Agency are sending spacecraft to observe it. It's a stress test you can't replicate in a lab.
Mark
Will people actually be able to see it?
Mimi
Yes. About two billion people in Europe, Africa, and Asia should be able to spot it with their naked eye if the sky is clear. It won't look like a boulder hanging overhead—more like a bright point of light moving fast. It'll cross the width of the full Moon in about a minute.
Mark
What does it feel like, knowing something that big is coming that close?
Mimi
Relief, mostly. For twenty years there was uncertainty. Now there's clarity. It's not a threat. It's an event. That's a different thing entirely.
Il Polso
- A 2.7% collision probability in 2004 sent Apophis to the top of planetary defense watchlists, making it one of the most closely monitored objects in the solar system.
- Radar observations in March 2021 finally closed the case — eliminating even a distant 2068 impact scenario and removing Apophis from NASA's official risk register.
- On April 13, 2029, the asteroid will pass within 32,000 km of Earth's surface, closer than geostationary satellites, streaking visibly across the skies of Europe, Africa, and Asia in a matter of minutes.
- Earth's gravity will physically stress the asteroid during the flyby, potentially triggering surface quakes — turning a former threat into a live laboratory for planetary science.
- NASA's OSIRIS-APEX spacecraft and ESA's Ramses mission are both being positioned to observe the event, marking one of the most coordinated asteroid studies in history.
For a brief moment in 2004, a newly discovered asteroid named after the Egyptian god of chaos carried a genuine, if small, probability of ending civilization as we know it. Over two decades of patient observation, humanity's instruments refined the picture until the threat dissolved entirely — not because the danger was never real, but because knowledge, accumulated carefully, has a way of replacing fear with clarity. On April 13, 2029, the asteroid Apophis will pass closer to Earth than the satellites that carry our phone calls, visible to billions of people across three continents, arriving not as a destroyer but as a rare and instructive guest.
When astronomers first spotted Apophis in 2004, the numbers were unsettling: a 300-meter-wide rock bearing a 2.7 percent chance of striking Earth in 2029. Named for the Egyptian deity of chaos, the asteroid lodged itself in the public imagination as something between scientific concern and apocalyptic symbol. That story, however, has since been rewritten entirely.
NASA now confirms that Apophis poses no collision risk in 2029, 2036, 2068, or for at least a century beyond. The shift came not from any change in the asteroid itself, but from the steady accumulation of observational data. A decisive radar sweep from Goldstone in March 2021 eliminated the last remaining impact scenario, and Apophis was formally removed from NASA's risk list. Two decades of watching had simply made the danger disappear.
What remains is something rarer and more wondrous. On April 13, 2029, Apophis will pass within 32,000 kilometers of Earth's surface — closer than the geostationary satellites overhead — and will be visible to the naked eye across Europe, Africa, and Asia. It will cross a stretch of sky equal to the width of the full Moon in roughly one minute, sweeping from Australia across the Indian Ocean and onward toward the Atlantic.
The flyby carries real scientific weight. Earth's gravity will compress and stretch the asteroid as it passes, potentially triggering surface shifts — a natural stress test observed in real time. NASA's repurposed OSIRIS-APEX probe will study Apophis after closest approach, while ESA's Ramses mission aims to be in position before the flyby to capture whatever tidal forces produce. The asteroid technically retains its 'potentially hazardous' classification, but the label now describes geometry, not destiny. What began as a harbinger of destruction arrives in 2029 as a cosmic visitor — close enough to see, far enough to be safe.
When astronomers first detected the asteroid Apophis in 2004, they had reason to sound the alarm. Early calculations suggested a 2.7 percent chance it could collide with Earth in 2029—a genuinely unsettling probability when the object in question spans more than 300 meters across. The name itself, borrowed from the Egyptian deity of chaos and destruction, seemed to invite catastrophe. For years, Apophis occupied a place in the public imagination somewhere between scientific concern and doomsday scenario. But the story has shifted dramatically since those first anxious months.
NASA now says with certainty that Apophis will not hit Earth in 2029, nor in 2036, nor in 2068, nor for at least the next hundred years. The asteroid's trajectory has been mapped with such precision that scientists can predict its position down to a few kilometers. The turning point came in March 2021, when radar observations from Goldstone allowed researchers to eliminate even the remote possibility of a 2068 impact. Apophis was officially removed from NASA's risk list. What changed was not the asteroid itself, but humanity's ability to track it. As more telescopes collected data over two decades, the collision odds simply evaporated.
What Earth will experience instead is a cosmic near-miss of extraordinary proportions. On April 13, 2029, Apophis will pass within 32,000 kilometers of our planet's surface—closer than the geostationary satellites that deliver television signals, phone calls, and weather forecasts to billions of people. For roughly two billion people across Europe, Africa, and Asia, the asteroid will be bright enough to see with the naked eye. It will streak across the sky at such speed that it will traverse the width of the full Moon in about one minute, beginning its visible arc over Australia, crossing the Indian Ocean, sweeping above Africa, and continuing toward the Atlantic. The entire passage will take only minutes—the time it takes to brew a cup of tea.
Astronomically speaking, 32,000 kilometers qualifies as a near miss. The European Space Agency notes that objects of Apophis's size approach Earth this closely only once every 5,000 to 10,000 years. Yet there is no collision risk. The asteroid's orbit and Earth's satellites travel at different angles; their paths will not intersect. The event is rare but safe—a distinction that matters enormously.
What makes April 2029 scientifically valuable is what happens to Apophis as it approaches. Earth's gravitational pull will stretch and squeeze the asteroid, potentially triggering surface quakes or landslides—a kind of interplanetary stress test. NASA has already committed to sending OSIRIS-APEX, a repurposed spacecraft, to observe the asteroid after its closest approach. The European Space Agency's Ramses mission plans to rendezvous with Apophis before the flyby, positioning itself to capture whatever tidal forces unleash. Scientists around the world are preparing their telescopes. What began as a threat has become an opportunity: a chance to study how gravity shapes a distant object in real time, with the entire event visible from Earth.
The label "potentially hazardous asteroid" still applies to Apophis in NASA's technical classification. But the phrase means only that the object is large and its orbit brings it close to Earth—nothing more. The doomsday narrative has given way to something more interesting: a rare astronomical event that will be visible to billions and studied by the world's space agencies. Apophis will arrive in 2029 not as a harbinger of destruction, but as a cosmic visitor, close enough to see, far enough to be safe.
Citazioni salienti
Objects this size fly by this close only once every 5,000 to 10,000 years— European Space Agency
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