The Space Station isn't invincible. It's surviving because humans won't let it die.
What You'll Discover
- The Unseen Machine: Why 400km Feels Fragile
- Air, Water, Heat: The Quiet Heroes of ECLSS
- The Drowning Spacewalk: When EVA-23 Nearly Killed Luca Parmitano
- The SARJ-ectomy: Fixing What Shouldn't Break
- The Tinkerer's Ethos: Don Pettit and the Culture Shift
- The Console Chorus: Meet the People Who Keep You Alive
- Interdependence: How the ISS Forces Enemies to Cooperate
- Kintsugi in Orbit: Why Repairs Make It More Valuable
- The ISS Legacy: What Happens After 2030
The Unseen Machine: Why 400km Feels Fragile
The International Space Station is falling.
Not dramatically. Not today. But constantly, reliably, inexorably—pulled by Earth's gravity through the thin whisper of atmosphere that still exists at 400 kilometers up. Every orbit, it loses altitude. Without intervention, it would spiral home like a wounded bird.
So we push it back up. Russian Progress spacecraft fire their engines. We nudge it higher. Again and again and again.
This is the baseline truth about the ISS: it only survives because humans refuse to let physics win.
It's been up there since 1998. That's longer than most marriages. Longer than your car will last. Longer than the laptop you're reading this on will function. And unlike those things, you can't pull the ISS into a garage when something breaks. When a pump fails at 27,600 kilometers per hour in a vacuum, you fix it in place. While it's moving. While six people depend on it for their next breath.
I think about this when I'm helping a parent troubleshoot a baking soda volcano at 9pm on a school night. The kid's crying because the vinegar-to-soda ratio is wrong and nothing's erupting. The parent's exhausted. But here's what I tell them: troubleshooting is the science. The ISS taught us that. The station isn't valuable because it works perfectly—it's valuable because when it fails, someone figures out why and fixes it before anyone dies. Your kid's failed volcano? That's them learning the same thing astronauts know. Failure is just data wearing a disguise.
The ISS has suffered:
- Coolant leaks in aging Russian modules (Zvezda has been hemorrhaging air since September 2019)
- A backup radiator leak in brand-new Nauka (proving that "new" doesn't mean "invincible")
- Fretting corrosion that ate through critical joints
- A spacewalk that nearly drowned an astronaut in his own helmet
- Countless smaller failures that never made headlines but could have
Zero fatalities aboard. That's the quiet headline that should make you pause.
The thing people miss—and this matters more than the hardware—is that the ISS operates in a regulatory gray zone that won't exist for the next generation of stations. NASA self-certifies its own safety. No external FAA oversight because it's a government lab, not a commercial venture. But every leak, every near-miss, every improvised fix? That's becoming the legal foundation for how the FAA will certify commercial stations. Axiom and Orbital Reef aren't just learning from ISS failures—they're using them as proof their designs can survive the same conditions. The scars are becoming certification requirements.
💡 Quick Reality Check: The ISS isn't failing because it's old. It's revealing its age because we're watching it this closely. Every sensor reading, every pressure gauge, every motor current—it's all monitored, 24/7, by people whose job is to catch problems before they become disasters.
The question isn't "Is the ISS safe?" The question is: "How do we keep outsmarting entropy?" And the answer—beautifully, frustratingly, inspiringly—comes down to people.
Let's talk about air first. Because nothing matters if you can't breathe.
Air, Water, Heat: The Quiet Heroes of ECLSS
ECLSS is your invisible mother. No roar. No sparkle. Just pumps, filters, and reactors—endlessly stripping CO₂, cracking water into oxygen, holding the temperature between freezing void and sun-baked oven. Unsexy. Essential. Tireless.
The Environmental Control and Life Support System doesn't ask for attention. It just works. And it's redundant. This matters more than almost anything else. The ISS doesn't have one oxygen generator—it has multiple systems that can back each other up. Russian Elektron units that split water. American scrubbers that pull CO₂ from the air. If one fails, another picks up the load. If that one fails, there's another. And if everything fails simultaneously? You have enough bottled oxygen and lithium hydroxide canisters to last long enough for a rescue or repair.
Redundancy isn't paranoia. It's the difference between "problem" and "tragedy."
The water system recycles everything. Sweat, urine, humidity from breathing. The joke is that today's coffee was yesterday's coffee, and it's not entirely a joke. The system recovers about 90% of all water, turning waste into something you can drink, wash with, rehydrate food with. It's not poetic. It's just physics and filters and the grim necessity of being 400 kilometers from the nearest faucet.
When I run water cycle experiments with school groups—condensation in bags, filtration through sand and gravel—kids inevitably ask if the water is "gross." And I tell them: every drop of water on Earth has been through a dinosaur, a cloud, an ocean, a tree, probably a hundred living things before it reached your water bottle. The ISS just does it faster and more honestly. There's something clarifying about watching condensation collect on the inside of a sealed bag and realizing that's the same water that was vapor five minutes ago. It's all a cycle. Always has been. The ISS just makes it visible.
Heat is trickier. Space doesn't have air to conduct heat away from you, so the ISS uses ammonia loops—giant radiators that dump waste heat into the void. When one of those loops fails (and they do fail), temperatures spike. Systems overheat. People sweat. Engineers scramble.
The genius isn't that ECLSS never fails. The genius is that when it fails, there's always a Plan B. Sometimes Plan C and D, too.
💡 Pro Tip for Systems Designers: Build three ways to do everything critical. Then add a fourth. The ISS proved that redundancy isn't expensive—it's priceless.
But sometimes, redundancy isn't enough. Sometimes, you need humans to make impossible choices in real time.
The Drowning Spacewalk: When EVA-23 Nearly Killed Luca Parmitano
July 16, 2013. EVA-23. Extravehicular Activity, which is NASA-speak for "going outside."
Luca Parmitano—Italian astronaut, test pilot, competent and calm—was about 44 minutes into a routine spacewalk when he felt something wet at the back of his neck.
Water. Inside his helmet.
In space, water doesn't drip. It doesn't flow. It globules. It clings to surfaces, spreads in films, floats in wobbly spheres. And inside a helmet, it can cover your nose. Your mouth. Your eyes.
Luca couldn't wipe it away. His hands were locked inside pressurized gloves. He couldn't take the helmet off—there's no air outside. He couldn't see—water was pooling over his eyes. He could barely hear—water was filling his ears. And he was 250 meters from the airlock.
He was drowning. In space. In his own spacesuit.
"I'm heading back," he radioed, voice steady despite everything.
The astronauts and Mission Control worked fast. Chris Cassidy, his EVA partner, guided him back by touch. Flight controllers talked him through. Luca couldn't see, so he navigated by feel and memory—hand over hand along the station's exterior, fighting his own suit as water kept spreading.
He made it back. They got his helmet off. He'd had between 1 and 1.5 liters of water sloshing around his head by the end.
This is the part that keeps me up some nights. Because here's what happens in that moment: you have a choice. Panic, or trust the people talking in your ear. Trust that Chris knows where you are even though you're blind. Trust that Houston isn't lying when they say you have time. Trust that your hands remember the route even though your brain is screaming. Luca trusted. And that's why he's alive.
The Mishap Investigation Board (MIB) later found the culprit: contamination in the water separation system—ironically, the part of the suit meant to keep water away from the astronaut. Small particles had clogged a filter, allowing water to backflow into the ventilation loop.
But the MIB uncovered something worse than a mechanical failure. They found normalization of deviance.
On a previous EVA—EVA-22, just a week earlier—Luca had reported a small amount of water in his helmet. Engineers investigated. They saw moisture but decided it was probably just residual condensation from the drink bag. Annoying but not dangerous. So they cleared him for EVA-23 with the same suit.
That decision nearly killed him.
The phrase "normalization of deviance" came from the Columbia disaster investigation, but it applies everywhere humans work under pressure. It's what happens when your team sees the same small problem five times and starts calling it "normal" instead of "recurring." It's the homework that's always late becoming "just how that kid is." It's the slight burning smell from the laptop that becomes "oh, it always does that." Until the day it doesn't just smell. It catches fire.
⚠️ Warning Sign: When your team starts treating anomalies as "known nuisances," you're one step away from catastrophe. The difference between "acceptable risk" and "deadly mistake" is often just one more datapoint you ignored.
The ISS grounded all US EVAs for months. They redesigned the suits. They added snorkels (yes, literal snorkels) to helmets so astronauts could breathe through their mouths if water filled the helmet again. They retrained everyone on anomaly reporting.
Luca went back outside a year later. He completed his spacewalk. Because the culture changed.
That's how you survive: you turn near-misses into lessons before they become fatalities.
The SARJ-ectomy: Fixing What Shouldn't Break
Let's talk about something that sounds boring until you realize it's critical: the Solar Alpha Rotary Joint. SARJ. A ten-foot-wide ring of gears that rotates the station's solar arrays to track the sun.
In September 2007, engineers noticed something odd. Metallic debris. Flakes of metal contaminating the joint's race ring. The gears were grinding themselves apart.
This was a problem. The arrays generate power. No power, no station. And they couldn't just turn it off and ship it back to Earth for repair. They had to fix it where it sat. In orbit. With limited tools. And limited time.
The culprit? Fretting corrosion. Two metal surfaces rubbing together, wearing each other down. The joint's trundle bearing assemblies were shaving tiny metallic particles off the race ring with every rotation. Over time, those particles acted like sandpaper, accelerating the damage.
The "fix" was brutal in its simplicity: astronauts went outside and cleaned it by hand.
Four spacewalks. Three astronaut teams. They scraped, wiped, and regreased the entire joint with Braycote 602EF—a specialized lubricant that could handle the temperature swings of space. It was part surgery, part custodial work, part mechanical improvisation.
And then they replaced twelve trundle bearing assemblies (TBAs) on a later mission, essentially rebuilding the joint piece by piece while it stayed attached to a functioning space station hurtling through orbit.
There's something almost absurd about the image. Astronauts in bulky suits, wielding scrapers and grease guns like they're working on a car in a driveway. Except the "driveway" is moving at 27,600 kilometers per hour and there's no air. This is the reality of space maintenance that science fiction never shows you: sometimes the cutting-edge solution is just elbow grease. Literally.
💡 Key Insight: Sometimes the "high-tech solution" is just getting your hands dirty. The ISS proved that grit, patience, and a willingness to grease gears in a vacuum can solve problems that computer models said were impossible.
It worked. The SARJ still rotates. The arrays still track the sun. Power still flows.
But here's the bigger lesson: The ISS didn't fail because of the SARJ problem. It survived because the culture allowed for multi-EVA, labor-intensive fixes. They didn't need a perfect solution. They needed a good enough solution, executed flawlessly.
Space doesn't punish imperfection. It punishes hesitation.
The Tinkerer's Ethos: Don Pettit and the Culture Shift
Don Pettit fixed a watch in space.
Not because the mission needed it. Not because Houston asked. Because he wanted to see if he could.
He's that kind of astronaut—the kind who invents a zero-gravity coffee cup out of plastic sheet stock so he can sip instead of suck from a bag. The kind who films water droplets oscillating in slow motion just to understand surface tension better. The kind who sees a broken system and thinks, "How do I make this work with what I have right now?"
NASA calls it on-orbit ingenuity. Pettit calls it tinkering.
And it represents a philosophical shift in how the ISS operates.
In the early days, astronauts were operators—they followed checklists, executed procedures, and waited for Houston to tell them how to fix things. They were pilots, not mechanics. But as the station aged and problems became more frequent and unpredictable, NASA realized something: the people on orbit needed to be empowered to improvise.
Pettit's watch repair wasn't about timekeeping. It was about proving that astronauts could solve problems without waiting for an engineering board to convene, simulate, test, and approve a solution six months later.
This shift mattered during the SARJ repairs. It mattered when coolant leaked and crews had to isolate loops on the fly. It mattered when Zvezda started venting air and cosmonauts had to MacGyver temporary patches while engineers figured out long-term solutions.
I see this same tension in education constantly. Teachers who won't let kids touch the materials until they've explained every step. Parents who hover over science fair projects, redoing anything that looks "wrong." But the ISS taught us something profound: competence comes from permission to try, fail, and fix. Pettit didn't ask for permission to tinker. He just did it. And NASA learned to trust that instinct instead of squashing it.
The ISS is still alive because someone like Pettit looked at a problem and thought, "I can probably fix that with duct tape and physics."
💡 Cultural Lesson: If your team waits for permission to solve obvious problems, you've already failed. Empower your people to tinker, improvise, and trust their own expertise.
But individual ingenuity only works if there's a team behind it—people on the ground who can say "yes" or "stop" at the right moments.
👉 If This Resonates, Let Me Know
You're halfway through, and I'm curious: is this hitting the mark? Drop a comment or share which section grabbed you most—it helps me understand what's landing. The console team is up next, and they're the unsung choir that keeps this whole thing singing. Or just keep reading. Either way, we're in this together.
The Console Chorus: Meet the People Who Keep You Alive
When something breaks on the ISS, the astronauts are the hands. But the brain is sitting in Houston.
Mission Control isn't one person barking orders. It's a chorus of specialists, each watching a different thread of the station's survival. They have call signs—ETHOS (Environmental and Thermal Operating Systems), EVA (spacewalk coordinator), FLIGHT (the conductor who makes final calls).
Let's meet a few:
ETHOS watches the air, water, and heat. When CO₂ levels tick upward, ETHOS sees it first. When a pump's motor current drifts outside normal range, ETHOS notices. They're the ones who can tell, from telemetry alone, that a cooling loop is about to fail six hours before it actually does.
EVA coordinates spacewalks—plans every move, tracks every minute, watches biometrics (heart rate, suit pressure, oxygen levels) like a hawk. When Luca Parmitano started drowning, EVA was the voice in his ear guiding him home.
FLIGHT is the final authority. The one who says "go" or "no-go" for every major decision. When SARJ started shedding metal, FLIGHT had to decide: do we keep rotating and risk more damage, or lock it in place and lose power flexibility?
These aren't technicians reading scripts. They're people who've trained for years to recognize the pattern of a failure before it becomes obvious—who can look at three unrelated datapoints and say, "Something's wrong."
Holly Ridings, NASA's first female Flight Director, described the job as "tough and competent 2.0." Not just knowing the systems, but knowing how they interact. Not just catching problems, but predicting them.
During EVA-23, the console team didn't panic. They didn't freeze. They worked the problem, step by step, talking Luca through every action while simultaneously coordinating with engineers, medical, and EVA to ensure he got back safely.
Zero drama. Maximum competence.
The ISS survives because the people watching it treat anomalies like breadcrumbs—tiny signals leading to bigger truths. They catch the faint hum of a failing motor. The slight drift in cabin pressure. The odd temperature spike that could be nothing... or could be everything.
💡 Pro Tip for Leaders: Build teams who listen to weak signals. The difference between catastrophe and "close call" is often someone who noticed something small and said, "That's weird."
But even the best team on Earth can't save the station if the station itself is fundamentally broken. And here's a secret: the ISS was never designed to work alone.
Interdependence: How the ISS Forces Enemies to Cooperate
The ISS is a geopolitical miracle held together by physics.
American power systems. Russian propulsion. European labs. Japanese modules. Canadian robotics. It's a patchwork of nations that don't always like each other, forced to cooperate because the alternative is failure.
The US provides electricity. Solar arrays, batteries, power distribution—all American.
Russia provides propulsion. The Progress and Soyuz spacecraft that boost the station's orbit, adjust its attitude, provide emergency escape—all Russian.
One cannot survive without the other.
When Russia invaded Ukraine in 2022, the world held its breath. Would Russia abandon the ISS? Would the US kick them out? The answer, surprisingly, was no—because both sides need the station to work.
If Russia pulled out, the US would lose its primary propulsion. If the US pulled out, Russia would lose power. The station would die.
So they kept working together. Not because they wanted to. Because they had to.
This isn't poetic. It's pragmatic. And it's a lesson for anyone building complex systems: interdependence is a feature, not a bug.
But it's also a source of strain. Zvezda's air leaks have been worsening since 2019. Russian engineers have tried patches, sealants, temporary fixes. The leak rate is still climbing. NASA watches nervously, unable to fix a problem in a module they don't control. The US and Russia can't even agree on what's causing it—Russia thinks it's vibration fatigue, NASA suspects it's multi-causal (pressure, mechanical stress, material degradation). They're managing a crisis they can't diagnose together.
At some point, the leak could become unsustainable. And then what?
But interdependence cuts both ways. When the ISS is deorbited around 2030, Russia controls the propulsion for the final burn. The US owns most of the modules. If relations sour further, you have a hostage situation—not over operations, but over how it dies. Who decides the deorbit trajectory? Who fires the engines? There's no published exit protocol. The same dependency that kept it alive could make the ending messy. This is the lesson commercial stations need to learn: build partnerships with exit clauses, not just entry terms.
There's something almost tragic about it. Two nations that put a human footprint on the moon, that built the most complex machine ever assembled in orbit, that proved humans can live in space—and they can't agree on how to let it go gracefully. Interdependence works brilliantly until someone wants out. Then it becomes a trap.
The ISS is teaching us that survival in space requires more than good engineering. It requires trust, compromise, and the willingness to depend on people you might not choose as partners anywhere else.
⚠️ Strategic Insight: If your project's success depends on adversaries cooperating, build the dependencies deep and mutual. Make it impossible for one side to walk away without destroying value for everyone.
But here's the thing—interdependence only works if you treat scars as strengths.
Kintsugi in Orbit: Why Repairs Make It More Valuable
Kintsugi is the Japanese art of repairing broken pottery with gold.
The idea: the cracks are part of the object's history. The repair makes it more beautiful, more valuable, because it broke and was made whole again.
The ISS is kintsugi in orbit.
Every repair—every spacewalk to fix SARJ, every patch on Zvezda, every redesigned spacesuit after EVA-23—is a gold seam. The station is more valuable because it survived these failures. More trustworthy because we know exactly how it breaks and how to fix it.
Compare that to a pristine, untested system. Sure, it's shiny. But does it work under pressure? You don't know until something breaks.
The ISS? We know it works. We've tested it for 27 years in the harshest laboratory imaginable.
The telemetry is the gold. Every sensor reading, every failure mode, every on-orbit fix—that data is worth more than the hardware itself. Because the next generation of space stations—Axiom, Orbital Reef, commercial LEO platforms—won't have to guess how systems fail. They'll know. Because the ISS told them.
Zvezda's leaks taught engineers about long-term material degradation. SARJ's fretting corrosion revealed lubrication failure modes. EVA-23 exposed normalization of deviance and led to safer EVA protocols. Every scar is a lesson.
But here's the hidden transfer of value: the ISS failures are becoming regulatory blueprints. Commercial stations will need FAA certification—something the ISS never required. Axiom and Orbital Reef are using ISS telemetry to prove their designs can handle known failure modes. Zvezda's leaks? That's now a test case for long-term pressure vessel integrity. SARJ's fretting corrosion? That's a baseline for mechanical joint endurance standards. The FAA is turning ISS scars into certification checkboxes. The gold seams aren't just metaphorical—they're legal proof of survivability.
When I help a kid repair a failed project—a collapsed bridge, a circuit that sparked, a garden that drowned—I ask them: what did you learn? And more importantly: what would you tell the next kid who tries this? That's the ISS model. The failure isn't the end. It's the most valuable part if you document it honestly.
💡 Philosophical Shift: Stop treating failure as something to hide. Treat it as data. The most valuable systems aren't the ones that never break—they're the ones that break, get fixed, and teach you why.
The ISS will be deorbited around 2030. It will burn up in the atmosphere—a controlled dive into the Pacific Ocean. But its lessons will remain.
And that's the real legacy.
The ISS Legacy: What Happens After 2030
The ISS is mortal.
NASA and its international partners have committed to operations through 2030, with Russia committed through at least 2028. After that, it comes home—in pieces, trailing fire, splashing into the ocean in a controlled deorbit planned for 2031.
But its legacy is already being written.
Commercial LEO platforms are the heirs. Axiom Station, Orbital Reef, others—private companies building the next generation of space habitats using lessons learned from the ISS.
They'll build in redundancy because ECLSS taught them. They'll monitor telemetry religiously because Zvezda taught them. They'll empower on-orbit ingenuity because Don Pettit taught them. They'll plan for multi-EVA repairs because SARJ taught them.
The ISS proved that humans can live in space long-term—not in a pristine lab, but in a real, messy, constantly-breaking environment. It proved that interdependence, however uncomfortable, works. It proved that disciplined improvisation beats rigid adherence to plans.
Here's what I find most moving about the ISS story, and why I keep coming back to it in my work: it's proof that humans are fundamentally problem-solvers. Not because we're smarter than entropy, but because we refuse to quit. Every parent who's sat up past midnight helping a kid rebuild a collapsed tower, every teacher who's explained the same concept twelve different ways until it clicks, every person who's looked at a broken thing and thought "I can fix this"—you're doing what the ISS does. You're refusing to let the thing die.
Here's what the ISS taught us:
- Redundancy saves lives. Build backups for your backups.
- Culture eats procedures. A team that notices weak signals and acts on them beats a team that follows checklists blindly.
- Interdependence is strength. When enemies must cooperate, build the dependencies so deep that failure hurts everyone equally.
- Scars are data. Every repair, every failure mode, every patch—it's all gold seams in the kintsugi.
- Empower the people closest to the problem. Astronauts shouldn't need permission to fix obvious issues.
The ISS won't last forever. Nothing does. But the humans who kept it alive—the engineers, flight controllers, astronauts, cosmonauts—they proved something profound:
We can survive in space. Not because the machines are perfect. Because we refuse to let them fail.
The ISS is mortal, but its legacy is immortal, written not in steel but in hard-won knowledge. For over two decades, it wasn't just a lab; it was a schoolhouse in the void, teaching us the messy, frustrating, and ultimately triumphant reality of keeping humans alive in a place that wants them dead. Every commercial station now being built—from Axiom to Starlab—is standing on the shoulders of the ISS, using the operational playbook written during every frantic leak patch, every grueling spacewalk to fix a solar array, and every reboot of a life-support system [User Query]. The scientific breakthroughs in human physiology and life support weren't just for science's sake; they are the direct precursors that make missions to the Moon and Mars even conceivable. And its greatest lesson might be diplomatic: it proved that even on Earth's most fractured political terrains, you can force cooperation through shared risk and deep, unavoidable interdependence.
The end, when it comes in 2031, will be as monumental as the beginning. The station won't just fall; it will be meticulously, deliberately, and respectfully guided home in the most complex atmospheric reentry ever attempted. This isn't a failure; it's the final act of responsible ownership. After a slow, managed decay of its orbit, a purpose-built SpaceX deorbit vehicle will give the 400-ton giant one last push. Its final destination is Point Nemo, the most remote spot in the Pacific Ocean, a "spacecraft cemetery" where it will join other legends like the Mir station. This billion-dollar maneuver is the ultimate expression of the ISS ethos: it's proof that we are fundamentally problem-solvers, refusing to let the thing die chaotically, instead ensuring it ends with the same precision and care that kept it alive for thirty years.
Out of the station's final, fiery descent, a new ecosystem is already rising. The heirs are the commercial platforms, a fleet of private outposts built not by superpowers but by entrepreneurs. 1 NASA is making a profound strategic pivot, stepping back from being an owner-operator to become an anchor customer, deliberately fostering a competitive marketplace in low-Earth orbit. 2 This has ignited a race between fundamentally different philosophies: Axiom's methodical plan to attach its modules to the ISS first, Starlab's audacious bet on a single, massive launch, and Vast's agile sprint to be the first commercial station in orbit. 3 This new era is also starkly geopolitical. The unipolar world of the ISS, defined by the US-Russia partnership, is being replaced by a multipolar frontier, with a US-led commercial bloc rising to compete with China's formidable, state-run Tiangong station. 4 The future of living in space won't be a single outpost, but a bustling, competitive, and complex new economy
🎯 Your Move: What Will You Build?
The ISS is a blueprint. Not for hardware—for process. For culture. For how humans solve impossible problems under pressure.
Small Step: Pick one "known nuisance" in your system. The thing everyone's gotten used to. The anomaly that's "probably fine." Investigate it. Today.
Medium Step: Build a redundancy audit. What's your single point of failure? What happens if it breaks tomorrow? What's your Plan B? Your Plan C?
Big Step: Create a kintsugi log. Document every failure, every fix, every lesson. Don't hide the scars—make them visible. Treat them as the most valuable data you have.
The ISS didn't survive because it was perfect. It survived because people cared enough to catch the problems before they killed anyone.
What's your version of that?
❓ Frequently Asked Questions
Has anyone died on the ISS?
No. Zero fatalities aboard in 27 years of continuous operation. There have been close calls (EVA-23 being the most dramatic), but the combination of redundant systems, real-time monitoring, and trained teams has kept everyone alive. That said, space remains inherently dangerous—the safety record is a testament to vigilance, not invincibility.
How does the ISS get air?
Multiple systems work together: Russian Elektron units split water (H₂O) into hydrogen and oxygen using electrolysis. American systems scrub CO₂ from the air and either vent it or process it further. Backup oxygen is stored in pressurized tanks. If all systems fail, there's enough reserve to keep the crew alive long enough for a resupply or evacuation.
What happens if the ISS springs a major leak?
The station is divided into modules with hatches that can be sealed. If one module starts leaking, the crew closes it off and moves to another. They also have leak detection tools—ultrasonic sensors, and even tea leaves suspended in air currents to detect airflow. Smaller leaks, like Zvezda's ongoing issue, are monitored and managed with temporary patches while engineers work on permanent solutions.
Why can't they fix the ISS Zvezda leak permanently?
The leak is in a section that's hard to access—a transfer tunnel (called the PrK) connecting to Zvezda's aft docking port, likely filled with equipment and structural elements. Russian engineers have tried sealants and patches, but the leak rate keeps climbing. The challenge isn't knowledge—it's access. Fixing it might require significant disassembly or an extensive EVA, both of which carry their own risks. The US and Russia also disagree on the root cause and severity of the problem.
Will the ISS be replaced?
Yes, but not by another international government project. NASA is transitioning to commercial LEO platforms—private companies like Axiom, Blue Origin, and others building stations for research, tourism, and manufacturing. NASA will be a customer, not the owner. The model shifts from "government-owned lab" to "commercially-operated destination."
🧩 Myth vs. Truth
Myth: "The ISS is basically flawless—space is routine now."
Truth: Space is routine because humans catch faint signals (motor currents, CO₂ drifts, pinhole leaks) and respond with disciplined weirdness. Nothing about the ISS is automatic or guaranteed. It survives because people—flight controllers, astronauts, engineers—treat every anomaly as a potential catastrophe until proven otherwise. Routine is the result of vigilance, not the absence of danger.
Myth: "New modules don't fail."
Truth: Space bullies everyone. Nauka, the newest Russian module (added in 2021), suffered a backup radiator leak in 2023. New doesn't mean invincible. It just means you haven't discovered all the failure modes yet.
🪞 Reflection Point
Pause here. Think about your own systems—your team, your project, your organization.
When did "known nuisance" become "ignored warning"? What's the anomaly you've normalized?
Which telemetry do you treat as background noise? What's your plan if it spikes?
What's your organization's kintsugi? Where are the repairs, the patches, the improvised fixes that actually make you stronger because you survived them? Are you hiding those scars—or showing them as proof of resilience?
The ISS taught us that survival isn't about perfection. It's about paying attention and refusing to quit.
What are you paying attention to?
About Penny Waite
When I was small, the night sky was a fairytale. The moon was bigger. The stars were brighter. Every pinprick of light felt like it was winking just for me, like the universe was telling me secrets.
I'd beg my dad to lift me up so I could touch the moon—that luminous disc hanging impossibly close in the sky. My fingers would stretch toward the stars, reaching for magic I could almost taste. I never touched them, but in those moments, suspended between earth and cosmos, the universe felt like it was mine to hold. Like it was trying to be touched.
Now I help others see it too. I write experiment books for parents navigating homework panic at 8pm. I develop science curricula that turn school trips into adventures. I direct science fairs where thousands of kids discover their curiosity matters. I translate the universe into something you can explore in your kitchen, your backyard, with your kids—because wonder shouldn't require a laboratory or a degree.
Here's what I know: curiosity is the antidote to despair. When you genuinely try to comprehend the scale of a galaxy—really try—something shifts. The broken dishwasher, the empty petrol tank, the endless scroll of anxiety... they don't disappear. But they shrink to their true size. You see them as what they are: tiny, temporary moments in an existence so vast and strange it defies comprehension.
Through a child's eyes, the moon is bigger. The stars are brighter. The night sky is a fairytale.
I write to give you those eyes back.
I'm still reaching for the stars. Come reach with me.
Sources & Verification
This article draws from NASA mission reports, ISS Mishap Investigation Board findings on EVA-23 (July 16, 2013), technical documentation on SARJ repairs (September 2007 discovery, repaired with Braycote 602EF during STS-126 in November 2008), and ongoing reporting on Zvezda air leaks (first detected September 2019). Key incidents are documented in public NASA archives. For real-time updates on ISS operations, see nasa.gov/station.
Information last checked October 2025. This article provides general information about space station operations and is not intended for YMYL (Your Money, Your Life) decision-making. For current mission status or safety protocols, consult official NASA sources.
