A [[planet]]'s or [[star]]'s '''Roche limit''' is the smallest distance a satellite (which is held together only by gravitational forces) can approach it without being desintegrated by tidal forces. Generally, there are two forms of the Roche limit: one for a solid satellite, an other, bigger one for a fluid satellite. | A [[planet]]'s or [[star]]'s '''Roche limit''' is the smallest distance a satellite (which is held together only by gravitational forces) can approach it without being desintegrated by tidal forces. Generally, there are two forms of the Roche limit: one for a solid satellite, an other, bigger one for a fluid satellite. |