The Fastest Star in the Galaxy: The Discovery of S301 at 25,000 km/s and the Ultimate Test of Einstein Around Sagittarius A*
Discover star S301, detected by the ESO racing at 25,000 km/s (8.5% of light speed) around supermassive black hole Sagittarius A*. Learn how its orbit unlocks the black hole’s spin and tests Einstein’s General Relativity.