A groundbreaking study, based on observations from the European Space Agency’s billion-pixel Gaia space telescope, has revealed a “gravitational anomaly” that challenges our fundamental understanding of the universe. The anomaly occurs when loosely orbiting stars, known as wide binaries, seem to move in ways that defy standard models of gravity established by Albert Einstein and Isaac Newton. Astronomer Kyu-Hyun Chae from Sejong University in South Korea made the discovery while studying binary star systems, which refer to two stars that orbit each other. At accelerations of lower than 0.1 nanometres per second squared, the orbit of the two stars deviated…
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