Our current understanding of black holes and white holes suggests that stars are not located inside them. Let's explore the concepts of black holes and white holes to understand why.
Black holes are extremely dense regions in space where the gravitational pull is so strong that nothing, not even light, can escape their gravitational grasp. They form when massive stars collapse under their own gravity at the end of their life cycle. The collapse causes the star's mass to be concentrated in a singularity, which is a point of infinite density at the center of the black hole. The region surrounding the singularity is called the event horizon, beyond which nothing can escape.
White holes, on the other hand, are hypothetical objects predicted by some solutions of Einstein's general relativity equations. They are essentially the reverse of black holes. While black holes pull matter and energy into them, white holes are theorized to expel matter and energy outward. According to the current understanding, white holes would be regions in space from which nothing can enter, and they would emit matter and energy instead.
Based on our observations and theoretical models, we have not detected any stars residing inside black holes or white holes. The formation of black holes involves the collapse of massive stars, so the stars themselves do not survive the process. Once a star collapses to form a black hole, it essentially disappears from our view because light cannot escape from it.
As for white holes, they are purely theoretical constructs that have not been observed in nature. While they are mathematically consistent with certain solutions of general relativity, there is currently no direct evidence for their existence. Therefore, we have no reason to believe that stars would exist inside white holes.
In summary, our understanding of black holes and white holes suggests that stars do not exist inside them. Black holes are formed from collapsed stars, and once a star collapses to form a black hole, it is no longer observable. White holes, while theoretical, have not been observed, and there is no indication that stars would be found within them.