Assuming you had an interstellar spaceship, how would you navigate around the galaxy? For starters, you'd probably need a map. But there's billions of stars out there, how could you orientate a map to find the quickest route from Earth to the exoplanet called Gliese 777 b (in the constellation of Cygnus) for example?
You could just plot a route directly to your planned destination, but that would mean traversing the badlands between the Milky Way's spiral arms that contain few stars (and, presumably, few interstellar gas stations) than if you followed the curving arms.
In the style of London's famous Tube Map, Samuel Arbesman, research fellow at Harvard Medical School, has re-imagined the Milky Way, simplifying our cosmic home. Although the Milky Way Transit Authority (MWTA) was created for fun and pure curiosity, it does provide an an accurate insight to the scale and locations of various nebulae, clusters and the solar system's location (Sol) in our galaxy.
The original London "Tube Map" was designed by Harry Beck in 1931 who realized that from the perspective of a traveler inside one of the underground carriages, the physical locations of train stations were irrelevant. This is when Beck designed the various colored lines of the London Underground in the form of a basic circuit board-like diagram. The simplicity of the design has led to its widespread use in cities around the world.