An orbiting disco ball gave Einstein’s theory its most precise test yet
SMRTR summary
Using two orbiting satellites — a disco ball-like sphere called LARES-2 and NASA's older LAGEOS — scientists measured Earth's spacetime-twisting effect with just 0.2% uncertainty, confirming Einstein's general relativity more precisely than ever while also narrowing the scope of competing quantum gravity theories.
SMRTR provides this summary for quick context. The original article belongs to Ars Technica.
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