"However... A week ago, the machine suffered a momentary malfunction. Celestia went to see if she could repair the damage, and... integrated herself into the Moon Engine. My own investigations after the event exposed that, little over a few weeks prior, a lone unicorn made her way into the Moon Engine chamber and managed to damage both it and herself during the transfer into the machine. Unfortunately, I can't release or awaken either of them from outside the system. And if I were to enter it and get stuck, like I suspect Celly is... I can't abandon my duties raising the sun and moon."