Something in Deep Space Is Flashing Every 44 Minutes and No One Knows Why

PERTH — Something deep in the Milky Way is pulsing like clockwork, and no one knows what it is. Every 44 minutes, a mysterious space object nearly 15,000 light-years away sends out a blast of radio waves and high-energy X-rays, defying everything astronomers thought they knew about how stars behave. It’s not a pulsar, not a black hole, and not quite like anything we’ve ever seen before. Now, scientists say this bizarre cosmic beacon might be rewriting the rulebook on extreme stellar physics.

For the first time, astronomers from the International Centre for Radio Astronomy Research (ICRAR) have found what’s known as a long-period radio transient that also emits X-rays — something that had never been observed before and wasn’t predicted by existing models. This discovery of ASKAP J1832−0911, published in Nature, introduces a new class of celestial object and calls into question long-standing assumptions in astrophysics.

Long-period radio transients (LPTs) were already baffling because they pulse thousands of times more slowly than standard pulsars, which are essentially the cosmic lighthouses that sweep beams across space. To put it in perspective, typical pulsars flash radio signals every few milliseconds. Scientists say the extraordinary energy involved in this new discovery is unprecedented in our galaxy.

An Object That Defies Expectations

Located 14,700 light years away, ASKAP J1832−0911 first appeared on astronomers’ radar in December 2023 using the Australian Square Kilometre Array Pathfinder telescope. When it lit up, the radio signal was unusually intense, peaking at 1,870 milliJansky, making it one of the brightest radio transients ever detected.

But the real surprise came in February 2024 when NASA’s Chandra X-ray Observatory observed the same patch of sky. It detected X-ray pulses with the same 44.2-minute period, and both signals appear to come from the same source.

Even stranger: this object doesn’t shine steadily. During its active phase in February, it was blasting out strong radio and X-ray signals. But by August, it had gone quiet, fading almost completely. This kind of extreme on-and-off behavior is rare and suggests something powerful is flipping a cosmic “switch” behind the scenes.

Scientists also found that the radio waves were highly structured, which is a clue that the object has an extremely strong and organized magnetic field — likely billions or even trillions of times stronger than Earth’s.

“Discovering that ASKAP J1832-0911 was emitting X-rays felt like finding a needle in a haystack,” said lead author Dr. Ziteng (Andy) Wang from the Curtin University node of ICRAR, in a statement. “The ASKAP radio telescope has a wide field view of the night sky, while Chandra observes only a fraction of it. So, it was fortunate that Chandra observed the same area of the night sky at the same time.”

Two Theories Push Physics to Its Limits

Researchers have narrowed the explanation down to two possible, but extreme scenarios.

First possibility: ASKAP J1832−0911 is an ancient magnetar — a type of neutron star with magnetic fields trillions of times stronger than Earth’s. Magnetars typically get their power from the decay of these intense magnetic fields. Computer models show that many known magnetars would have similar characteristics to ASKAP J1832−0911 after about 500,000 years of evolution.

However, generating bright radio emissions from such old magnetars creates serious theoretical problems that scientists are still trying to solve.

The other possibility? It might be part of a white dwarf binary system — a pair of stars locked in a tight orbit, with at least one of them being a super-dense, Earth-sized remnant of a dead star. In this case, the intense magnetic interaction between the two could be generating the radio bursts. But for that to work, one of the stars would need a magnetic field stronger than any white dwarf ever discovered.

Either way, the object exists in a zone scientists call the “death valley” of space, an area where normal rules for star emissions are expected to break down. And yet, this object is clearly active, glowing, and pulsing.

Rethinking What Long-Period Transients Can Do

What really shocked astronomers was just how much energy this object gives off. The X-rays alone are as powerful as a billion billion lightbulbs. That’s far more than scientists thought these slow-spinning objects could produce.

“This detection reveals that these objects are more energetic than previously thought,” the authors write, “and establishes a class of hour-scale periodic X-ray transients.” Translation: this could be the first of a whole new category of slow-blinking, high-energy objects that no one knew existed.

Researchers conducted an extensive observational campaign using telescopes across multiple continents and in space. They confirmed that both the radio and X-ray emissions follow the same precise 44.2-minute cycle, ruling out the possibility that these are separate, unrelated phenomena.

The discovery also raises an intriguing possibility: many similar objects might be hiding throughout our galaxy, waiting to be caught during their brief periods of activity. The researchers suggest that previous studies may have missed X-ray emissions from other similar objects because they weren’t looking at the right time during these brief active phases.

ASKAP J1832−0911 is yet another demonstration that the universe is still full of surprises. In a time when scientists often assume they’ve figured out how stars work, this one strange object proves that space still has secrets — and some of them are flashing at us every 44 minutes.