The speed of a star orbiting a black hole can vary significantly depending on the black hole’s mass and the star’s proximity. A notable example is the star S2, which orbits the supermassive black hole Sagittarius A* at the center of our Milky Way galaxy. S2’s orbit has been measured to reach speeds up to 7,650 kilometers per second, which translates to approximately 27,540,000 kilometers per hour or about 17,100,000 miles per hour, especially at its closest approach, or pericenter, to the black hole. This extreme velocity is due to the intense gravitational pull of the black hole, which influences any nearby object or star. It’s important to note that not all stars orbiting black holes reach such high speeds, as it greatly depends on the individual system’s characteristics.