1.astropy / astropyAstronomy and astrophysics core librarypythonastronomyscienceastrophysicsastropyPythonBSD-3-CLAUSE5.4K total2.2K forks+87 starsfrom 5,320 · score 4.48
2.brandon-rhodes / pyephemScientific-grade astronomy routines for PythonCOther license900 total132 forks+4 starsfrom 896 · score 1.61