Artist illustration of 3 stars near Milky Way black hole | ESO/M. Parsa/L. Calçada

Giant Star, Massive Black Hole Give Einstein’s Relativity Theory an Extreme Test

The star S2 showed slight deviations in its orbit of a black hole at the center of the galaxy, showing Einstein’s theory holds even within gravity fields containing the mass of 4 million suns.

The position of the supermassive black hole at the center of our Milky Way galaxy, as well as the giant star S2, are shown (inset) in this near-infrared image from the European Southern Observatory's Very Large Telescope in Chile. The black hole's position is marked with an orange cross. | ESO/MPE/S. Gillessen et al.