[This did manage to finally pause The Doctor's ramblings. Sometimes he needed an interruption to get him on topic. He wasn't used to trying to have quite so many people follow his train of thought. Not many ever managed.]

Earth and Sontar are both located in Mutter's Spiral. Better known as The Milky Way. Delphon is located in the satelite galaxy now called Galaxy Seven.

[Leaning back against his desk, he watched Yuuto as he answered the question. Pausing to see if the student had any further questions.]