Astronomers discover the largest rotating structure ever observed in the Universe

Astronomers have identified the largest known rotating structure in the Universe — a vast system consisting of several hundred galaxies connected by filaments of dark matter, spanning 49 million light-years in diameter, according to researchers at the University of Oxford.

The structure is remarkable not only for its enormous scale but also for the unusual alignment and rotation patterns of the galaxies within it. Lead researcher Chong Soen compared the phenomenon to a “teacup ride” at an amusement park: each galaxy spins like an individual cup, while all of them together rotate within a much larger cosmic mechanism.

Cosmologists have long theorized that the Universe resembles a giant three-dimensional cosmic web, where dark matter filaments intersect to form dense nodes containing galaxies and galaxy clusters. Studying these nodes may reveal how galaxies grow and how large-scale cosmic structures emerge.

Using South Africa’s MeerKAT radio telescope, scientists observed a segment of the web located 430 million light-years from Earth. They found 14 galaxies aligned along a 5.5-million-light-year filament. Measurements showed that galaxies on opposite sides of the structure rotate at similar speeds but in opposite directions — clear evidence that the entire structure is spinning.

Further observations revealed similar rotational patterns in hundreds of nearby galaxies, leading scientists to conclude that the entire 49-million-light-year-long filamentary structure rotates as a whole. This makes it the largest rotating object ever detected in the Universe.