Lightyear is a physical constant (julianyr * lightspeed), not astronomical

Author: rieder

src/amuse/units/amuse_2010/__init__.py

@@ -0,0 +1 @@
+# constants as originally defined/used in AMUSE

src/amuse/units/astronomical_constants.py …its/amuse_2010/astronomical_constants.pysrc/amuse/units/astronomical_constants.py renamed to src/amuse/units/amuse_2010/astronomical_constants.py src/amuse/units/astronomical_constants.py renamed to src/amuse/units/amuse_2010/astronomical_constants.py

@@ -7,9 +7,9 @@
 from amuse.units.si import m, kg
 from amuse.units.derivedsi import W, km
 
+
 au = 149597870691.0 | m
 parsec = au / np.tan(np.pi / (180 * 60 * 60))
-lightyear = 9460730472580.8 | km
 Lsun = 3.839e26 | W
 Msun = 1.98892e30 | kg
 Rsun = 6.955e8 | m

src/amuse/units/constants.py src/amuse/units/physical_constants.pysrc/amuse/units/constants.py renamed to src/amuse/units/physical_constants.py

@@ -4,6 +4,7 @@
 
 import numpy
 from . import constants
+from . import physical_constants
 from . import astronomical_constants
 from . import quantities
 
@@ -50,7 +51,7 @@
 kpc = named("kilo parsec", "kpc", 10**3 * parsec)
 Mpc = named("mega parsec", "Mpc", 10**6 * parsec)
 Gpc = named("giga parsec", "Gpc", 10**9 * parsec)
-lightyear = named("light year", "ly", astronomical_constants.lightyear.as_unit())
+lightyear = named("light year", "ly", (physical_constants.c * julianyr).as_unit())
 LSun = named("solar luminosity", "LSun", astronomical_constants.Lsun.as_unit())
 MSun = named("solar mass", "MSun", astronomical_constants.Msun.as_unit())
 RSun = named("solar radius", "RSun", astronomical_constants.Rsun.as_unit())