A bold question sits at the heart of this story: could the Universe be whispering a hidden order into its own spinning? The James Webb Space Telescope is challenging a long-held belief about how cosmic bodies rotate, and the implications could ripple across our understanding of space itself.
Everything in the cosmos turns in some way: stars whirl, planets rotate, and galaxies spin. Some objects spin clockwise, others counterclockwise, and for decades astronomers assumed these directions would balance out across the universe. But Webb’s latest observations are prompting a re-evaluation of that assumption.
Webb has one of astronomy’s most ambitious missions: to peer deep into the early cosmos and illuminate how the first galaxies came to be after the Big Bang. In nearly three years of high-resolution imaging, the telescope has delivered discoveries that range from intriguing to confounding. The most surprising finding yet questions a fundamental aspect of the early Universe: the direction in which many of the first galaxies rotate.
Spinning galaxies in the same direction
A team from Kansas State University reports a striking pattern in the Monthly Notices of the Royal Astronomical Society: a majority of the early galaxies appear to be spinning in the same direction. “It’s almost obvious when you look at the data,” says Lior Shamir, a computer science professor and the study’s lead author.
Historically, researchers expected roughly equal numbers of clockwise and counterclockwise rotating galaxies. Yet when the Kansas State team analyzed Webb data, they found nearly two-thirds were rotating clockwise. In other words, the early Universe may have harbored more order than scientists anticipated.
Shamir and colleagues acknowledge the finding is perplexing. It could point to a real cosmic preference, or it might be an illusion created by how we observe distant objects.
Reality or illusion?
Two explanations surface. First, the Universe itself might have been born with a rotation. If so, this ancestral spin should leave a signature in the cosmic microwave background radiation, a relic glow from the early cosmos. So far, researchers have not detected such a fingerprint, which makes this idea bold and controversial. If the Universe did begin spinning, our standard cosmological models would need a major revision.
Second, and perhaps less dramatic but equally important, the effect could be a perceptual illusion. Because the Earth orbits the center of the Milky Way, our vantage point can subtly influence how we perceive galaxy rotation. What was once considered a negligible bias might demand careful recalibration of deep-space distance measurements. If true, this could ripple through cosmology, potentially helping to explain puzzling discrepancies in cosmic expansion rates and the apparent ages of some giant galaxies.
Either way, Webb’s finding forces cosmologists to revisit core assumptions and refine their methods. The telescope has once again shown that the Universe still holds surprises, and that even familiar ideas can be upended by new data.
Nathalie Mayer
Journalist
Born in Lorraine on a winter night, storytelling has long colored my view of science. A physicist turned science communicator, I’ve collaborated with organizations like CEA, Total, Engie, and Futura. Today I explore Earth’s environmental and energy challenges, blending rigorous science with storytelling to illuminate solutions.
