LARES-2 Satellite Confirms Earth's Frame-Dragging Effect

Researchers have precisely measured Earth's frame-dragging effect using data from the LARES-2 satellite, along with the LAGEOS and GRACE satellites. This measurement, published online on July 8, 2026, in Nature, provides strong confirmation of Albert Einstein's theory of general relativity. The findings also serve to constrain alternative theories of gravity and have led to improvements in the measurement of Earth's tides.

Frame-dragging, also known as the Lense-Thirring effect, is a prediction of general relativity that describes how a rotating massive body warps the fabric of spacetime around it. The LARES-2 satellite, launched in 2022, is specifically designed to conduct highly accurate measurements of gravitational effects. Its precise orbit and instrumentation allowed scientists to detect and quantify this subtle distortion of spacetime caused by Earth's rotation.

The unprecedented precision achieved in this study significantly strengthens the evidence supporting general relativity. By confirming this fundamental aspect of Einstein's theory, the research helps to rule out or limit the scope of many alternative gravitational models that have been proposed over the years. This rigorous testing of fundamental physics is crucial for advancing our understanding of the universe.

Beyond confirming general relativity, the data gathered from the LARES-2 mission has also yielded benefits in geophysics. The refined measurements of Earth's frame-dragging have contributed to more accurate determinations of Earth's tidal effects. Understanding these tidal forces is essential for various scientific disciplines, including oceanography, geology, and climate science.