Bodies in this region are replenished by an inner region named for Hills, and this region was first theorized based on the gravitational perturbation of objects originating from it.
One observable phenomenon in this region can be caused by galactic disk tides or a close proximity with passing foreign stars, and the objects contained in this region were expelled from the protoplanetary disk by gravitational forces of the gas giants. Bodies in this region are replenished by an inner region named for Hills, and this region was first theorized based on the gravitational perturbation of objects originating from it. Containing Sedna and believed to be the source of long-period comets, For 10 points, name this spherical region encompassing the Sun named for its Dutch discoverer.
One observable phenomenon in this region can be caused by galactic disk tides or a close proximity with passing foreign stars, and the objects contained in this region were expelled from the protoplanetary disk by gravitational forces of the gas giants.
Opik-{Oort Cloud}