grale.constants

This module defines several constants that can be used to express necessary quantities in.

Throughout the program, basic SI units are assumed, but with the constants defined in this module it is easy to convert certain quantities to these units. These constants are:

MASS_SUN

DIST_PC

DIST_KPC

DIST_MPC

DIST_GPC

SPEED_C

CONST_G

ANGLE_DEGREE

ANGLE_ARCMIN

ANGLE_ARCSEC

ANGLE_MILLIARCSEC

ANGLE_MICROARCSEC

grale.constants.ANGLE_ARCMIN = 0.0002908882086657216: Angle one arcminute, expressed in radians.

grale.constants.ANGLE_ARCSEC = 4.84813681109536e-06: Angle one arcsecond, expressed in radians.

grale.constants.ANGLE_DEGREE = 0.017453292519943295: Angle of one degree, expressed in radians.

grale.constants.ANGLE_MICROARCSEC = 4.848136811095361e-12: Angle one microarcsecond, expressed in radians.

grale.constants.ANGLE_MILLIARCSEC = 4.84813681109536e-09: Angle one milliarcsecond, expressed in radians.

grale.constants.CONST_G = 6.673e-11: The gravitational constant, expressed in units of 1 m^3/(kg s).

grale.constants.DIST_GPC = 3.0856775714409183e+25: Distance of one gigaparsec expressed in units of 1 m.

grale.constants.DIST_KPC = 3.0856775714409185e+19: Distance of one kiloparsec expressed in units of 1 m.

grale.constants.DIST_MPC = 3.0856775714409185e+22: Distance of one megaparsec expressed in units of 1 m.

grale.constants.DIST_PC = 3.0856775714409184e+16: Distance of one parsec expressed in units of 1 m.

grale.constants.MASS_SUN = 1.98855e+30: Solar mass expressed in units of 1 kg.

grale.constants.SPEED_C = 299792458.0: The speed of light, expressed in units of 1 m/s.