Data Sources

Stars

• An Extended Hipparcos Compilation (XHIP); Anderson E., Francis C. (2012) VizieR V/137D
• Big Sky Catalog - compilation of Hipparcos, Tycho-1, Tycho-2 in Epoch J2000

Constellation Lines

• IAU Constellation page (via d3-celestial)
• Stellarium (via Sky & Telescope)

Constellation Borders

• Catalogue of Constellation Boundary Data; Davenhall A.C., Leggett S.K. (1989) VizieR VI/49 (via d3-celestial)

Deep Sky Objects (DSOs)

• OpenNGC

Moon & Planet Sizes

• NASA - Solar System Sizes
• NASA - Moon Facts

Milky Way Outline

• Created by Steve Berardi with QGIS + GDAL from NASA's Deep Star Maps