exercism/ruby/space-age/space_age.rb

# SpaceAge class
class SpaceAge
  EARTH_YEAR_IN_SECONDS = 31_557_600

  def initialize(age_in_seconds)
    @age_in_seconds = age_in_seconds
  end

  def on_earth
    @age_in_seconds.to_f / EARTH_YEAR_IN_SECONDS.to_f
  end

  def on_mercury
    on_earth / 0.2408467
  end

  def on_venus
    on_earth / 0.61519726
  end

  def on_mars
    on_earth / 1.8808158
  end

  def on_jupiter
    on_earth / 11.862615
  end

  def on_saturn
    on_earth / 29.447498
  end

  def on_uranus
    on_earth / 84.016846
  end

  def on_neptune
    on_earth / 164.79132
  end
end