Why are we unlikely to find Earth-like planets around halo stars in the Galaxy?
A)Planets around stars are known to be extremely rare.
B)Halo stars formed in an environment where there were few heavy elements to create rocky planets.
C)Any such planets would have been ejected long ago by galactic mergers.
D)Halo stars do not have enough mass to hold onto planets.
E)Halo stars formed in a different way from disk stars.

Question

Quizplus · Accepted Answer

Halo stars formed early in the history of the Galaxy, when there were few heavy elements present. Rocky planets like Earth require heavy elements to form, so it is unlikely that Earth-like planets could have formed around halo stars.

Why Are We Unlikely to Find Earth-Like Planets Around Halo