Sunnydale was a prime piece of stellar real estate when we colonized it. She’s hotter, brighter, and more massive than our own sun, and all of that makes her very special. Every star reaches out to nearby stars and forms links with them, the hyperspace runs that most ships use when traveling through the stars. Larger, hotter stars make stronger runs, along with systems composed of multiple stars. Sunnydale’s mass and power make her equal in strength to many of those major beacon stars. You can travel farther, faster, and safer on a Sunnydale Run than on the vast majority of runs anywhere else in the galaxy. That is why she is part of the highway to the stars we’ve used to explore the galaxy. And that is why we used her to attack the Hyades.