When Lucas Seaton pointed a telescope toward the constellation Pegasus, he found something that rewrote the cosmic speed records: a wind moving at 30% the speed of light, driven by a supermassive black hole 1.7 billion times the mass of our sun.
The quasar, known as J2318, sits in the Great Square of Pegasus and represents the fastest ultraviolet wind ever detected near a black hole—a discovery made possible when York University graduate student and lead author Seaton worked alongside his research team to analyze data from the Sloan Digital Sky Survey. What makes this find remarkable is not just the speed itself, but that we can see it at all. Quasars are powered by disks of superheated gas spiraling into black holes, disks so large they dwarf Earth's orbit around the sun and burn hotter than the sun's surface. The intense light from these cosmic furnaces pushes gas outward at velocities that beggar comprehension, yet most of those winds remain invisible to us.
Patrick Hall, the York University professor who leads the research team alongside graduate student Marianna Veltri and undergraduate Zezhou Zhu, explained the puzzle at the heart of this discovery. "In quasars, we often see winds of gas pushed away from the black hole by the light of the quasar," he said. "The wind in J2318 can be seen at ultraviolet wavelengths at velocities up to 30% the speed of light. Even faster winds can be seen at X-ray wavelengths, but J2318 is the fastest ever discovered at ultraviolet wavelengths."
The mechanism itself borders on poetic. Unlike the air pressure differences that create hurricanes on Earth, quasar winds are powered by light itself. Individual photons—tiny packets of energy—bounce off or get absorbed by atoms in the gas, transferring momentum with each interaction. When a quasar produces enough photons, those infinitesimal pushes accumulate into speeds that would make the fastest earthly storm seem frozen in time. Seaton offered a vivid comparison: "In terms of its speed, this quasar's wind could be called a category 79 hurricane. Every category of hurricane is about 20% faster than the category below it."
Yet the physics presents a paradox. The same photons that accelerate the gas to such extreme speeds also tend to strip electrons from atoms, rendering them invisible. "The problem is, the photons can also remove all the electrons from the atoms, making them invisible," Hall notes. "How to push the gas to the speeds we see while keeping the carbon and silicon ions we see intact… it's quite a puzzle."
The discovery emerged from a collaboration that transformed undergraduate researchers into active contributors. When Marianna Veltri, then an undergrad at York, flagged J2318 as potentially interesting in 2023, and Zezhou Zhu's software analysis revealed the extreme wind velocity, Hall secured confirmation using the eight-meter Gemini North telescope in Hawaii. What makes this work significant extends beyond the quasar itself: it demonstrates how modern surveys and student involvement are democratizing astronomical discovery. As Hall explains, initiatives like the SDSS Faculty and Students Team enable undergraduates to make the kind of discoveries that once required a doctorate to even attempt.
The findings, published in The Astrophysical Journal, were made possible through data from the SDSS-IV Time-Domain Spectroscopic Survey and SDSS-V Black Hole Mapper, projects that have involved hundreds of astronomers since 1998. This discovery reminds us that the universe's most extreme physics often hides in plain sight—waiting for someone with the right tools and the curiosity to look.