Starfall is a cosmic catastrophe of a skill that first menaced players with meteorites in Dragon Quest VIII: Journey of the Cursed King.
Starfall has no proper name in its first appearance, with the text box simply stating that the foe has summoned meteors to flatten the party. It deals 80~96 damage to all allies, and carries the Rock/Strike attribute that Knuckle Sandwich and Boulder Toss do. This means Jessica has an innate 25% resistance.
Starfall gained an actual title in IX, as well as a much broader damage range. The exact calculation is (50 + 5 * level) * 0.9~1.1, meaning the minimum range is 180~220, and the upper limit is 490~599. It bears the Earth attribute, so make sure to wear armor that can stifle soil when battling a beastie that uses the skill.