600,000 kilometers, a slightly worrying distance.
"Where's the Cosmic String Network?"
"Captain, sir, the nearest Cosmic String is about 20 million kilometers away. This distance is considered safe unless gravitational fluctuations as massive as a black hole occur. However, ahead of us is an intersection of multiple Cosmic Strings, and we will approach one named Cosmic String GB0902."
Although Cosmic Strings are the highways of the Universe, they are also very dangerous places. If a hostile civilization uses a Super Graviton Cannon to cause strong gravitational forces, it could easily tear a spaceship apart.
Therefore, after entering formal navigation, human fleets maintain a certain safe distance from them.
However, encountering Cosmic Strings is sometimes unavoidable; there are horizontal and vertical strings, and according to our current course, the horizontal Cosmic String right ahead of us must be crossed, and the nearest spatial distance is about 1.2 million kilometers.
