In a universe where mysteries are often hidden in the vast expanses of space, a groundbreaking study of wide binary stars is posing new questions and offering insights that could reshape our understanding of gravity.

The work of Professor Kyu-Hyun Chae of Sejong University has shown remarkable evidence that standard gravity may not be as constant as once believed. By analyzing up to 26,500 wide binaries within 650 light years observed by the Gaia space telescope, Chae’s team observed something extraordinary. In certain low-acceleration scenarios, the observed acceleration of these binary stars was 30 to 40% higher than predicted by Newton’s universal law of gravitation and Einstein’s general relativity. This deviation was not random but consistent, meeting the stringent 5 sigma criteria for a scientific discovery.

What’s fascinating about these results is their alignment with a modified understanding of gravity called modified Newtonian dynamics (MOND). Proposed 40 years ago by theoretical physicist Mordehai Milgrom, this theory has been overshadowed until now. The boost factor observed in Chae’s study is correctly predicted by a MOND-type theory called AQUAL, including the external field effect from the Milky Way galaxy, a unique prediction of MOND-type modified gravity.

Chae’s study went beyond mere observation, employing a Monte Carlo deprojection of observed sky-projected motions to three-dimensional space. This approach allowed for precise calculations of gravitational accelerations as a function of the separation between the binary stars. This level of detail is what sets Chae’s study apart, providing a strong and verifiable analysis that challenges conventional wisdom. The findings suggest a clear acceleration-dependent breakdown of standard gravity, in agreement with the AQUAL theory.

One of the most profound implications of this study is its potential impact on the concepts of dark matter and dark energy. Unlike galactic rotation curves, wide binary dynamics cannot be affected by dark matter, meaning that the observed deviations can only point to a fundamental shift in our understanding of gravity. The implications are immense, as a large amount of dark matter in galaxies may no longer be needed, shaking the very foundation of contemporary astrophysics.

The anomaly in wide binaries could lead to a new theory extending general relativity to the low acceleration MOND limit, similar to how anomalies in Mercury’s orbits led to Einstein’s general relativity. This could lead to a new revolution in physics, affecting everything from our understanding of black holes to gravitational waves and even quantum physics.

While these findings are thrilling, experts emphasize the need for independent confirmation and further investigation. This study could be the dawn of a new era, but it also demands meticulous scrutiny.


At Breaking News Streams, we continue to explore the mysteries of our universe, sharing the thrill of discovery and the pursuit of understanding. This new frontier in gravity is just one part of an ever-expanding journey into the unknown. Stay curious, stay informed, and continue your voyage with Breaking News Streams, where new wonders await.

For those intrigued by this groundbreaking study and wishing to delve deeper into the science behind it, the full paper is available in The Astrophysical Journal. Titled “Breakdown of the Newton–Einstein Standard Gravity at Low Acceleration in Internal Dynamics of Wide Binary Stars,” the research was conducted by Kyu-Hyun Chae and published on 2023 July 24. You can access the publication directly through the American Astronomical Society or via this link.

Journal information: Astrophysical Journal 

As we continue to witness the extraordinary unfold before our eyes, Breaking News Streams invites you to join us on this thrilling intellectual journey. Stay curious, stay informed.

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