An orbiting disco ball gave Einstein's theory its most precise test yet
Reported byArs Technica ↗·Sourced by Goodlede
Using the LARES-2 satellite (a 40-centimeter sphere of nickel-chromium alloy covered in retroreflectors), an international team led by Ignazio Ciufolini measured Earth's frame-dragging effect on spacetime with 0.2 percent uncertainty—the most accurate test of general relativity's Lense-Thirring effect to date, down from several percentage points of uncertainty.
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