Ossus

"Never in my life as a starfleet officer have I seen such carnage, i think I'm going to cry now, Mr Worf you have the bridge"

- Jean-Luc Picard upon Ossus's destruction

Ossus was a Planet home to a famed Jedi academy. Then some rabid freak attacked it. There was also a great Jedi Library that made Jocasta Nu extremely wet between the legs.