At Under Lucky Stars, we make our star maps with the greatest possible attention to scientific accuracy. We use the Bright Star Catalog from Yale University as our main source of celestial data, among several other astronomical databases. It contains galactic coordinates of all the stars visible from Earth with a naked eye. These coordinates place each star in a galactic coordinate system. When creating a map, we process six high precision data points of over 9,000 stars.
We don't want you to just take our word for it so we hired a NASA engineer to audit our maps. You can read about it here:
To learn more about the stars and constellations, you can visit sites like https://www.solarsystemquick.com or https://www.constellation-guide.com.