Orbital nightcloak

The Orbital Nightcloak consisted of a chain of thousands of satellites linked in a network. Each satellite distorted light and bent it towards itself. When placed in orbit of a planet, the satellites would prevent all sunlight from reaching the surface, creating utter darkness and eventually turning the world to solid ice, killing everything.

Conceived by the Warlord Zsinj, it was set up over Dathomir, holding the planet hostage until the inhabitants handed over New Republic general, Han Solo. Solo escaped Zsinj's clutches and succeeded in disrupting the chain of the Nightcloak satellites, saving the planet from being frozen.

All remaining satellites were most likely destroyed by the Hapan Battle Fleet that arrived at Dathomir shortly afterwards.