"""Parameters (not constants) that define Earth properties."""

molecular_weight_air = 28.97  # g/mol
earth_radius = 6371000  # m
mass_atmosphere = 5.1352e18  # mass of atmosphere, kg
seconds_per_year = 60 * 60 * 24 * 365.24219  # Length of tropical year
# https://en.wikipedia.org/wiki/Tropical_year
