Roche lobe [SEP] named after
which it orbits. It is different from the Roche limit which is the distance at which an object held together only by gravity begins to break up due to tidal forces. The Roche lobe, Roche limit and Roche sphere are named after the French astronomer Édouard Roche.
Definition.
In a binary system with a circular orbit, it is often useful to describe the system in a coordinate system that rotates along with the objects. In this non-inertial frame, one must consider centrifugal force in addition to gravity.
Lander and Ascent Module (SLAM) on the water-free lobe, dubbed Roche (French for rock as well as the name of the French mathematician who worked on Roche limits). After exploring Roche, they again split up, and one group journeys via the space-plane "Dragonfly" to the other lobe, Eau (French for water), which is covered almost entirely by ocean. The crew are caught in a violent storm that causes their plane to experience a crash water-landing. The flooded propulsion