asher-pembroke/planets_per_volume.md

Last active April 17, 2017 22:02

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planets_per_volume.md

from pint import quantity

import numpy as np

import pint
ureg = pint.UnitRegistry()

#shape of the galaxy
diameter = 1e5 * ureg.lightyear
thickness = 1000. * ureg.lightyear

volume = np.pi * pow(diameter/2,2) * thickness

# number of terrestrial like planets
planets = 1e6

planets_per_vol = planets/volume

planets_per_vol.to_compact()

127.323954474 1/kilolight_year³

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