It says “origin point”. If the planet consumes its star for firing, there needs to be a way to relocate the planet. Otherwise, the First Order spent an immeasurable amount of money and labour on a weapon that can fire only once. This clearly isn’t the case, as the weapon prepares to attack the Resistance base after the attack on the Republic. If we assume that they also tested the weapon sometime before the initial attack, the planet isn’t at it’s origin point anymore, when we see it for the first time.