It has been hiding behind a wall of interstellar dust for decades, invisible in ordinary light. It was catalogued in 1983 and then forgotten. And now, astronomers have confirmed that this strange object — a miniature version of the most violent phenomena in the universe — is pointing a beam of near-light-speed plasma almost directly at us.
The Discovery That Took 30 Years to Confirm
On September 22, 2026, an international team of astronomers led by researchers from Spain, the Netherlands, and Argentina announced the discovery of IRAS 18293−0941 — the first confirmed microblazar in the Milky Way galaxy.
The object is located approximately 12,000 light-years from Earth, in the direction of the constellation Scutum. It is a binary system: a hot, massive star orbiting a stellar-mass black hole — one that weighs about 10 times the mass of our Sun — once every 11.38 days. The black hole is slowly devouring its companion, stripping material from the star’s surface and pulling it into a superheated accretion disk.
But that’s not what makes it remarkable.
What makes IRAS 18293−0941 extraordinary is what the black hole does with the material it swallows. Part of it is expelled outward in two powerful jets — streams of ionised plasma travelling at approximately three-quarters the speed of light. And one of those jets is aimed almost directly at Earth.
What Is a Microblazar?
To understand why this matters, you have to understand the family of objects it belongs to.
Blazars are among the most energetic phenomena in the universe. They are a type of quasar — active galactic nuclei powered by supermassive black holes millions to billions of times the mass of our Sun. When these black holes feed, they launch jets of particles at near-light speed. If one of those jets happens to point toward Earth, the object appears extraordinarily bright across the entire electromagnetic spectrum.
Astronomers have known about blazars for decades. But since the 1990s, theorists have argued that the same mechanism should exist on a much smaller scale — in systems where a stellar-mass black hole feeds from a companion star, producing a jet pointed at us. They called these hypothetical objects microblazars.
The problem was that no one could find one.
For nearly 35 years, astronomers hunted for microblazars in the Milky Way. They found candidates, but every single one turned out to be an extragalactic blazar — a full-sized object billions of light-years away, not a miniature one in our own galaxy.
IRAS 18293−0941 is the first that survived scrutiny.
How They Found It: “Hiding in Plain Sight”
The object wasn’t discovered by a new telescope or a dedicated search. It was found in archival data from 1983.
The Infrared Astronomical Satellite (IRAS) catalogued IRAS 18293−0941 over four decades ago, but the object was largely forgotten because it sits behind so much interstellar dust that it is essentially invisible in ordinary optical images.
The breakthrough came when researchers led by Josep Martí of the University of Jaén and Benito Marcote of the Joint Institute for VLBI ERIC (JIVE) in the Netherlands cross-referenced the 1983 catalogue with modern radio observations. They noticed a small but very bright emission coming from only one side — what Marcote described as “the fingerprint of blazars”.
They initially assumed it was another distant blazar. But when they combined data from multiple observatories — including radio telescopes, optical observations, and X-ray and gamma-ray data — they were able to pinpoint its location. It was inside our galaxy.
“Everything about IRAS 18293−0941 was hiding in plain sight,” Martí said. “It sits behind so much dust that it is essentially invisible in ordinary optical images. It was catalogued decades ago and then more or less forgotten”.
The confirmation came from two independent methods. Optical monitoring revealed the star’s 11.38-day orbit, showing that the system was being viewed almost face-on. Radio imaging with the European VLBI Network (EVN) — an array of telescopes spanning from South Africa to China to Europe — resolved the jet’s orientation and confirmed it was coming from the stellar system, not a background galaxy.
The Physics: How a Black Hole Becomes a Cosmic Catapult
To understand how a black hole can launch a jet at all, you have to look past the event horizon.
Nothing that crosses the event horizon can escape. But the material falling toward a black hole doesn’t plunge straight in. Because of the black hole’s rotation, infalling matter forms an accretion disk — a superheated whirlpool of plasma spinning at millions of degrees. Particles collide, heat up, and generate intense magnetic fields.
Some of the material does disappear beyond the event horizon. But the magnetic fields act like a cosmic catapult, accelerating a fraction of the plasma along the black hole’s rotation axis and firing it outward in two opposite directions at nearly the speed of light.
In IRAS 18293−0941, one jet points toward Earth. The other, invisible to us due to a prediction of Einstein’s theory of relativity, slams into a nearby cloud of interstellar gas and dust, carving out a bubble 100 light-years across and causing the cloud to glow.
Why This Discovery Matters
The discovery of IRAS 18293−0941 is significant for several reasons.
First, it confirms a 35-year-old prediction. Microblazars were theorised to exist, but until now, no confirmed example had been found in the Milky Way. The discovery validates the theoretical framework that connects stellar-mass black holes to their supermassive cousins.
Second, it provides a “scale model” for studying blazars. Supermassive blazars are too distant to be resolved in detail. “Having an analogue object in our galaxy allows for detailed study of blazar physics,” Marcote said. Because microblazars evolve much faster — changes that take thousands of years in a supermassive blazar happen in days or weeks in a microblazar — researchers can watch a “cosmic movie in fast-forward”.
Third, it may solve a longstanding mystery about high-energy particles. The jet from IRAS 18293−0941, slamming into that cloud of interstellar material, acts as a massive particle accelerator. The researchers estimate it could be producing particles with energies 100 times higher than the Large Hadron Collider, potentially making it one of the most powerful particle accelerators in the galaxy. This could help explain the origin of ultra-high-energy cosmic rays and neutrinos that have puzzled physicists for decades.
Should We Be Worried?
No.
Despite the dramatic framing — a black hole firing a beam of plasma almost directly at Earth — there is no danger. The jet is 12,000 light-years away. Even if it were pointed precisely at our solar system, the beam spreads out over that vast distance, and the black hole is stellar-mass, not supermassive. Its output is minuscule compared to the extragalactic blazars that astronomers study.
As EarthSky put it, borrowing a line from Willy Wonka & the Chocolate Factory: “Little surprises around every corner, but nothing dangerous”.
The jet’s proximity and orientation are a scientific gift, not a threat. It gives astronomers a front-row seat to one of the most extreme processes in the universe — a process that, until now, they could only study at billions of light-years’ distance.
IRAS 18293−0941 spent
decades in obscurity, hidden behind interstellar dust, catalogued and forgotten. When astronomers finally looked at it with modern instruments, they found something remarkable: a miniature version of the most energetic objects in the cosmos, pointing its beam almost directly at Earth.
It took 30 years to confirm. It may take many more to fully understand. But for the first time, astronomers have a blazar in their own backyard — a cosmic laboratory for studying the physics of black holes, jets, and the highest-energy particles in the universe.
And it was hiding in plain sight all along.
The study has been accepted for publication in Astronomy & Astrophysics.
