Why are we unlikely to find earth-like planets around halo stars in the galaxy? why are we unlikely to find earth-like planets around halo stars in th?

Halo stars are found in the space region of the Segmentum Obscurus. These stars are some of the oldest in the galaxy. However, they are situated in an environment where only very few elements are naturally occurring. Hence, most planets found there are rocky and are not suitable for habitable life.