No, not all stars orbit a black hole. In fact, the vast majority of stars in the universe do not orbit black holes. Stars are distributed throughout galaxies and can have a variety of orbits depending on their location and the gravitational influences within their respective galaxies.
Black holes are incredibly dense objects with extremely strong gravitational fields. They can form when massive stars collapse under their own gravity at the end of their life cycle. While black holes can have gravitational interactions with nearby stars, it does not mean that all stars orbit them.
In a galaxy, including our own Milky Way galaxy, stars typically orbit the center of the galaxy. The center of most galaxies contains a supermassive black hole, but the majority of stars in the galaxy do not directly orbit the black hole. Instead, they orbit the galactic center due to the overall gravitational pull of the combined mass of the galaxy's stars, dark matter, and other celestial objects.
Stars can have various types of orbits within a galaxy, including circular orbits, elliptical orbits, or even more complex paths. These orbits are primarily determined by the distribution of mass within the galaxy and the gravitational interactions between stars and other objects in the galactic system.
So, while black holes can have an impact on the dynamics of stars and other objects in their vicinity, it is not accurate to say that all stars orbit a black hole. The presence of black holes in a galaxy can affect the overall structure and evolution of the galaxy, but individual stars have their own unique orbits within the galactic system.