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GSL_CONST_MKSA_ASTRONOMICAL_UNITThe length of 1 astronomical unit (mean earth-sun distance), au.
GSL_CONST_MKSA_GRAVITATIONAL_CONSTANTThe gravitational constant, G.
GSL_CONST_MKSA_LIGHT_YEARThe distance of 1 light-year, ly.
GSL_CONST_MKSA_PARSECThe distance of 1 parsec, pc.
GSL_CONST_MKSA_GRAV_ACCELThe standard gravitational acceleration on Earth, g.
GSL_CONST_MKSA_SOLAR_MASSThe mass of the Sun.