Checkpoint 2

Second major checkpoint, dated Oct 20, 2023.

• Refines some existing star positions and luminosity information.
• Adds GAIA DR3 and various other star names to existing stars.
• Adds a new catalog: Contains all Earth-visible stars, but as a sphere with all stars equidistant from Earth instead of using their actual locations.
• Code updated to target a later version Node.js.
• Compartmentalises some of the math better for use as an external library.

Checkpoint 1

First release from Oct 2021.