import numpy as np

FULL_ARC = np.pi * 2
PI = np.pi
HALF_PI = np.pi / 2
G = 6.67408e-11
S_BOLTZMAN = 5.670373e-8
PLANCK_CONST = 6.626070150e-34
C = 299792458
BOLTZMAN_CONST = 1.380649e-23

# global SOLAR_RADIUS
SOLAR_RADIUS = 6.955E8  # m

# global SOLAR_MASS
SOLAR_MASS = 1.9891E30  # kg
