A galaxy was a fourth-level celestial system in the universe.
The famous Milky Way, for example, was a type of galaxy—a barred galaxy.
The Robert Galaxy, where Gao Gong was located, was a spiral galaxy composed of ring after ring of stellar vortices. According to Weiwei, it had a total of 125 stellar vortices. Forty-five had been explored, while the rest remained unexplored. Each stellar vortex was an irregular ellipse, ranging from tens of thousands of light-years in diameter at its largest to several thousand at its smallest. Numbered from bottom to top, they were designated the First Stellar Vortex, Second Stellar Vortex, Third Stellar Vortex... all the way to Stellar Vortex 125.
Every ten stellar vortices were further divided into the same star sector. In other words, the entire Robert Galaxy had twelve and a half star sectors.
The Holt Inner Stellar Vortex, where Gao Gong was located, should actually have been called the Second Stellar Vortex.
The black market he was heading to, meanwhile, belonged to the Fourth Stellar Vortex.
Both were part of the First Star Sector.
From the Second Stellar Vortex to the Fourth Stellar Vortex, one had to travel upward, passing from one cross-section to another, covering a total distance of roughly 300 light-years.
At the speed of a light-speed spacecraft, that meant flying for 300 years.
Of course, it would not actually take that long.
There was a type of interstellar structure called an "interstellar space station."
The role of an "interstellar space station" was similar to that of a gas station on a highway.
With the assistance of an "interstellar space station," a spacecraft could enter a warp-flight state—in other words, "faster-than-light travel."
Faster-than-light travel was 20,000 times the speed of light. At that speed, 300 years could be compressed into a mere