Romulus

Romulus was the original home planet of the Romulans. It was a roughly Earth-sized planet with many cities, home to large Romulan population. The planet was destroyed not long after the Romulan-Federation Alliance when its star went supernova nearly a million years before predicted, obliterating the planet and all who were on it at the time. The Romulan race nearly collapsed after this huge blow to their pride and strength.