A compilation a list of useful resources regarding stars and astronomy, for yet another project.
Physics Calculations http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/herrus.html#c3
(MIT) Star Colors: http://www.vendian.org/mncharity/dir3/starcolor/
(ATNF) Color of Stars http://www.atnf.csiro.au/outreach/education/senior/astrophysics/photometry_colour.html
HYG database (a 120k star catalog in csv format) can be found here: http://astronexus.com/node/34
BSC5P – Bright Star Catalog https://heasarc.gsfc.nasa.gov/db-perl/W3Browse/w3table.pl?tablehead=name%3Dbsc5p&Action=More+Options
(USNO) Optical/IR Products http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod
Eddington Luminosity https://en.wikipedia.org/wiki/Eddington_luminosity
(USNAVY) recommended star catalogs http://ad.usno.navy.mil/star/star_cats_rec.shtml
HABCAT http://phl.upr.edu/projects/habcat
OTHER RESOURCES
Large list of dev resources: http://www.procedural-worlds.com/blog/best-free-unity-assets-categorised-mega-list/
NORMAL MAP GENERATOR : http://cpetry.github.io/NormalMap-Online/