A Dead NASA Satellite Woke Up After 57 Years. No One Can Explain Why.

Added: 2026-06-04

[00:00:00]June 13th, 2024.

[00:00:02]Early morning.

[00:00:04]Western Australia. Middle of nowhere.

[00:00:07]Outback desert.

[00:00:09]A field of 36 enormous radio telescope dishes is quietly scanning the sky.

[00:00:15]This is the ASKAP array.

[00:00:17]One of the most sensitive radio observatories ever built. The researchers operating it that morning are hunting for something called fast radio bursts.

[00:00:27]Violent flashes of radio energy from billions of light-years away.

[00:00:31]Dead stars.

[00:00:33]Collapsing black holes.

[00:00:35]The far edge of the observable universe.

[00:00:38]And then, the detectors go haywire.

[00:00:41]Something is screaming from the sky.

[00:00:44]The burst is so powerful, it saturates the instruments.

[00:00:48]It outshines everything else in the radio sky at that moment. Pulsars, quasars, every known source drowned out by this single flash.

[00:00:58]It lasts less than 30 nanoseconds.

[00:01:02]30 billionths of a second.

[00:01:04]The team gets very excited.

[00:01:06]Because a signal that bright, >> [music] >> that brief, that completely unclassified, that's not routine.

[00:01:13]That's not something you log and move on from. That's a discovery.

[00:01:18]Maybe a neutron star nobody had cataloged. Maybe a magnetar doing something previously unobserved.

[00:01:25]Maybe and I know how this sounds, but these are scientists. They think about everything.

[00:01:32]Maybe something with no known explanation at all.

[00:01:35]They start tracing the source. They measure the signal's dispersion.

[00:01:40]The way radio waves stretch and slow as they pass through electrons in space.

[00:01:46]More electrons in the path means more dispersion.

[00:01:49]Which means a more distant source.

[00:01:52]The number they get back is almost zero.

[00:01:55]This signal passed through almost nothing.

[00:01:58]which means it didn't come from billions of light-years away.

[00:02:01]It didn't come from another galaxy.

[00:02:04]It came from inside our solar neighborhood, probably a few thousand kilometers from Earth.

[00:02:10]They get even more excited.

[00:02:12]Something that bright, that close, that completely unidentified.

[00:02:17]That's an extraordinary discovery.

[00:02:20]They start checking optical catalogs, searching for an unknown object in near-Earth space.

[00:02:26]There's a real energy in moments like this in science.

[00:02:30]A kind of held breath.

[00:02:32]And then, someone runs the satellite match.

[00:02:36]They take the exact sky position, the exact timestamp, [music] and they run it against the catalog of every known object in Earth orbit.

[00:02:46]Every piece of hardware humanity has ever sent up there.

[00:02:50]One match. NORAD ID 737.

[00:02:54]NASA's Relay 2 satellite, launched 1964, dead since 1967, drifting in silence for 57 years, completely forgotten. And on the morning of June 13th, 2024, for 30 nanoseconds, it was the loudest radio source in the observable sky.

[00:03:17]Nobody knows why.

[00:03:19]I want to sit with that for a second before we go any further, because I think the instinct when you hear this story is to reach for a tidy explanation.

[00:03:28]Solar flare, equipment glitch, some technical footnote that resolves the mystery.

[00:03:33]And I'll tell you right now, that explanation doesn't exist.

[00:03:38]The researchers who wrote the paper, published in 2025, are explicit about it.

[00:03:44]They have two hypotheses.

[00:03:46]Neither is confirmed.

[00:03:49]The cause of what happened to Relay 2 on that June morning remains, as of today, genuinely unknown.

[00:03:56]That doesn't happen very often in satellite history.

[00:03:59]Usually there's an answer.

[00:04:01]Usually the mystery closes.

[00:04:03]This one hasn't.

[00:04:05]So, let me take you back to where relay two came from.

[00:04:08]Because to understand why this event is so strange, you need to understand what the satellite was, what it did, and what it means that it's been up there for 57 years with nobody watching.

[00:04:23]The year is 1962.

[00:04:25]NASA is barely 4 years old. The space race is at full intensity.

[00:04:30]And a small team at RCA, the Radio Corporation of America, is building something genuinely new.

[00:04:37]A communications satellite. Not a weapon. Not a spy platform.

[00:04:43]A satellite whose entire purpose is to carry human voices and television images across oceans.

[00:04:49]The first one, relay one, launched in December 1962.

[00:04:54]And it did something nobody had ever done before. It transmitted live television footage from the United States to Japan and Europe.

[00:05:03]For the first time in history, you could sit in Tokyo and watch something happening in real time in New York.

[00:05:10]That experience didn't exist as a human possibility before relay one.

[00:05:16]And then suddenly it did.

[00:05:18]The first images it sent across the Pacific were of John F. Kennedy.

[00:05:24]And then, less than a year later, it carried the news of his assassination.

[00:05:29]The state funeral.

[00:05:31]A nation in grief broadcast across the ocean in real time.

[00:05:36]I find that genuinely hard to process even now.

[00:05:40]We live in a world where buffering video irritates us.

[00:05:44]But there was a specific datable moment in human history when live transatlantic television was a miracle.

[00:05:51]A small aluminum sphere spinning in orbit made it happen.

[00:05:55]Relay 2 launched on January 21st, 1964.

[00:06:01]78 kg, spin stabilized, two onboard transponders, three scientific instruments for mapping the Van Allen radiation belts, elliptical orbit ranging from about 2,000 to 7,400 km altitude, looping around Earth every 3 hours.

[00:06:21]During its working life, it participated in thousands of communication tests.

[00:06:26]It relayed the results of the 1964 presidential election to Europe.

[00:06:30]Lyndon Johnson won, in case you were wondering.

[00:06:34]And then, quietly, it stopped. No explosion, no drama.

[00:06:39]The first transponder started taking longer and longer to switch on in late 1966.

[00:06:46]By January 1967, it was gone.

[00:06:51]The second lasted a few more months.

[00:06:54]June 9th, 1967, last confirmed signal.

[00:07:00]And after that, silence. Relay 2 just kept orbiting, alone, for decades.

[00:07:08]This is the part I keep thinking about.

[00:07:10]We have launched thousands of objects into Earth orbit since 1957.

[00:07:15]Many of them are still up there, silent, derelict, slowly tumbling.

[00:07:21]We catalog them. We track their orbital positions.

[00:07:25]But cataloging something and paying attention to it are completely different things.

[00:07:30]Nobody was pointing a radio telescope at a dead 1964 communication satellite.

[00:07:35]Nobody was listening.

[00:07:37]It was just floating, moving through radiation, through plasma, through the slow grind of cosmic time, and we had no idea what was happening to it.

[00:07:49]Here's what I think is genuinely eerie about that.

[00:07:52]We have almost no information about what Relay 2 has been doing for 57 years.

[00:07:58]We know roughly where it is.

[00:08:00]We know it's still in orbit.

[00:08:02]But everything else, whether it was struck by anything, whether it degraded in unexpected ways, whether anything at all happened to it out there, unknown.

[00:08:14]For nearly six decades, the file on Relay 2 was essentially closed, a footnote from the Kennedy era, still physically present in the sky above us, completely ignored.

[00:08:25]Until ASCA accidentally looked at it.

[00:08:29]Now, the mystery of what caused the burst.

[00:08:33]The team ruled out one obvious possibility immediately.

[00:08:37]This was not the satellite coming back to life.

[00:08:41]Relay 2 has no power, no operational systems of any kind. Its transmitters, even when they were working, operated at completely different [music] frequencies than what ASCA detected, and were physically incapable of producing a 30 nanosecond pulse.

[00:09:00]That's simply not how 1960s communications hardware functioned. So, whatever caused this signal, it wasn't coming from inside the satellite. It was happening to it. That distinction matters, and it narrows things down considerably.

[00:09:16]Two explanations survived the team's analysis.

[00:09:19]The first is electrostatic discharge.

[00:09:22]And I want to explain this carefully, because I think it's stranger than it sounds.

[00:09:27]A spacecraft in orbit is not sitting in empty space.

[00:09:31]It's moving constantly through plasma, through solar wind, through magnetic fields.

[00:09:37]Different parts of the satellite's surface interact with this environment differently.

[00:09:42]Some regions accumulate positive charge, others negative.

[00:09:47]Over time, and we're talking potentially decades here, this builds up a voltage differential across the satellite's surface.

[00:09:55]And at some point, that differential becomes large enough that the charge jumps.

[00:10:00]A spark.

[00:10:01]Not through any circuit, not through any wire, just a physical arc across the body of the satellite itself.

[00:10:09]Electrostatic discharges happen on active satellites all the time.

[00:10:14]Engineers build entire systems to manage them.

[00:10:17]On the International Space Station, analyses have shown these arcs can damage equipment and have actually given electric shocks to astronauts during spacewalks.

[00:10:27]But here's the thing.

[00:10:28]Those events happen on satellites that are being monitored. On a dead 60-year-old aluminum shell with no one watching, we have essentially no data on what builds up, what's accumulated, what's waiting to discharge.

[00:10:43]Now, electrostatic discharges from satellites have been detected before with the old Arecibo telescope.

[00:10:49]But, and this is where it gets interesting, those events lasted microseconds, millions of a second.

[00:10:57]What came off Relay 2 was 30 nanoseconds, a thousand times shorter, and vastly more powerful.

[00:11:05]Whatever happened that morning was not within the range of any previously observed electrostatic event from a spacecraft, which means, even if the mechanism is electrostatic discharge, we don't actually understand what produced this particular version of it.

[00:11:21]The second explanation is a micrometeorite impact. Space is full of tiny particles, most smaller than a grain of sand, some smaller than a dust mote, moving at 20 to 30 km per second.

[00:11:35]At those speeds, even a particle 1 mm across carries the energy of a small explosion.

[00:11:42]When something that small hits a metal surface at those velocities, it doesn't dent it. It vaporizes it.

[00:11:50]The impact point becomes, for a fraction of a second, an expanding cloud of plasma.

[00:11:56]An incredibly hot, dense, ionized gas.

[00:11:59]And plasma, under certain conditions, emits radio waves. One of the researchers put it this way. If a micrometeorite struck Relay 2's aluminum body or its solar panels, the material would vaporize, and the resulting plasma would ring outward like a bell.

[00:12:17]A brief, intense pulse of radio energy, produced not by any electronics, not by any transmitter, but by the physical act of a tiny piece of rock destroying a tiny piece of spacecraft.

[00:12:29]I find that image genuinely arresting.

[00:12:32]A satellite that carried the first transatlantic television signal, that relayed the news of a president's death, sitting forgotten in orbit for 57 years.

[00:12:42]And then struck by something the size of a sand grain, moving at orbital velocity, briefly glowing in radio frequencies brighter than quasars.

[00:12:52]The team considers electrostatic discharge more likely.

[00:12:55]Micrometeorite impacts of sufficient scale to produce this exact signal would require very specific conditions that are hard to reproduce theoretically.

[00:13:06]But they're careful to say they cannot rule it out. And researcher Marcin Glowacki said it plainly, "What caused this signal from Relay 2?"

[00:13:16]That's a good question.

[00:13:18]We don't know.

[00:13:20]I respect that.

[00:13:21]I really do.

[00:13:23]There's always pressure in science communication to close the loop. Give the audience the answer. End uncertainty.

[00:13:30]But the honest answer here is that this event exceeded the predicted parameters for both known mechanisms. The burst was shorter and more powerful than any electrostatic discharge previously observed from space hardware.

[00:13:44]And the micro-meteorite scenario, while physically plausible, demands conditions that stretch the math.

[00:13:51]We are genuinely in new territory.

[00:13:54]And there's something else the researchers pointed out that I think deserves more attention than it's received.

[00:14:00]This was completely accidental.

[00:14:02]ASKAP happened to be covering that patch of sky at that exact moment.

[00:14:07]It happened to have the sensitivity and the real-time processing to catch something that lasted 30 [music] nanoseconds.

[00:14:15]If the telescope had been pointed slightly elsewhere, or if the analysis pipeline had been configured differently, this signal would have been missed entirely.

[00:14:25]How many times has Relay 2 done something like this before?

[00:14:29]How many times in 57 years of silent orbit has it discharged or been struck or lit up in some way with nobody there to see it?

[00:14:39]We have no answer.

[00:14:41]The 57 year silence in the records is not proof that nothing happened. It's proof that nobody was listening.

[00:14:48]Clancy James, the lead researcher, raised a broader point about this that stuck with me.

[00:14:54]If dead satellites can produce signals that look like astrophysical [music] fast radio bursts, if they can, at first glance, resemble signals from neutron stars or unknown cosmic phenomena, then every radio astronomer working with short duration transients now has to account for them. There are tens of thousands of objects in Earth orbit.

[00:15:16]Each one a potential false positive.

[00:15:18]But the flip side of that, and I think this is more interesting >> [music] >> is that this also means radio telescopes can potentially be used to monitor spacecraft.

[00:15:29]Not just active satellites, but dead ones. Derelict ones.

[00:15:34]Things nobody has checked on in decades.

[00:15:37]If ASKAP can accidentally catch a discharge or impact event on Relay 2, a systematic survey could, in principle, tell us what's happening to the entire population of orbital debris we've [music] been ignoring.

[00:15:51]James called it remote sensing of ESD using radio astronomy to see from the ground when something is happening to a piece of hardware thousands of kilometers above us.

[00:16:03]That capability did not exist as a concept before June 13th, 2024.

[00:16:10]I keep returning to one thing.

[00:16:12]Relay 2 was built when slide rules were the primary calculation tool for aerospace engineers.

[00:16:19]The people who designed it are old now.

[00:16:22]Many of them are gone.

[00:16:23]The satellite itself has been orbiting for longer than most people alive today have been alive. It predates the internet, the personal computer, the moon landing.

[00:16:34]It launched before humanity had ever walked on another world.

[00:16:38]And for 57 years, it was up there doing nothing visible, going nowhere, a relic from a specific, unrepeatable moment in history.

[00:16:48]>> [music] >> The early years of the space age, when everything was being invented for the first time.

[00:16:54]And then, one morning in the Australian Outback, an observatory built to see the edge of the universe accidentally pointed at the right piece of sky.

[00:17:04]And Relay 2, for 30 nanoseconds, was louder than everything.

[00:17:10]The graveyard is not as quiet as we thought. There are thousands of objects up there like Relay 2.

[00:17:16]Silent for decades, accumulating charge, moving through plasma.

[00:17:22]Being struck, maybe, by particles too small to track.

[00:17:27]And we have, until very recently, had no way of knowing what any of them are doing.

[00:17:33]That is a genuinely new problem.

[00:17:36]And a genuinely new capability to address it.

[00:17:40]I want to hear from you on what we cover next.

[00:17:44]Because there are a few directions I'm seriously considering. And I want to know which one you want first.

[00:17:51]There's Transit 5B-5.

[00:17:55]A [music] 1964 Navy navigation satellite that has been transmitting continuously for over 60 years.

[00:18:02]Not intermittently. Not occasionally.

[00:18:06]Continuously. Nobody has a fully satisfying explanation for how that's physically possible.

[00:18:13]There's Oscar 7. An amateur radio satellite declared completely dead in 1981 that came back to life in 2002 after [music] 21 years of silence and has been transmitting intermittently ever since.

[00:18:28]Built in someone's garage.

[00:18:30]>> [music] >> Still in orbit. And there's a chapter of the Soviet space program I haven't touched yet. Involving military surveillance satellites that officially did exactly what Moscow said they did and unofficially did some things that took decades to declassify.

[00:18:45]I'll say no more than that for now.

[00:18:47]Drop your vote in the comments. I read every one.

[00:18:51]And if there's a story you've been sitting on, something obscure, something Cold War, something that got buried in a footnote and never properly told, tell me.

[00:19:02]The best leads I've ever gotten have come from people watching this channel.

[00:19:07]See you in the next one.