Added solar system files

planet.rb

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+class Planet
+attr_reader :name, :diameter, :mass, :moons, :orbital_period, :rate_solar_rotation, :distance_from_the_sun
+  def initialize(planet_hash)
+    @name = planet_hash[:name]
+    #miles
+    @diameter = planet_hash[:diameter]
+    #kg
+    @mass = planet_hash[:mass]
+    @moons = planet_hash[:moons]
+    #days
+    @orbital_period = planet_hash[:orbital_period]
+    #km/hr
+    @rate_solar_rotation = planet_hash[:rate_solar_rotation]
+    #miles
+    @distance_from_the_sun = planet_hash[:distance_from_the_sun]
+  end
+
+  def orbits_around(sun = "The Sun")
+    puts "#{@name} orbits around #{sun}."
+  end
+end

solar_program.rb

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+require "./planet"
+require "./solar_system"
+
+this_solar_system = SolarSystem.new("The Solar System", 4.6e9)
+
+mercury = {name: "Mercury", diameter: 3032, mass: 3.285e23, moons: 0, orbital_period: 88, rate_solar_rotation: 172800, distance_from_the_sun: 35.98e6}
+venus = {name: "Venus", dimaeter: 7520.8, mass: 4.867e24, moons: 0, orbital_period: 225, rate_solar_rotation: 126077, distance_from_the_sun: 67.24e6}
+earth = {name: "Earth", diameter: 7917.5, mass: 5.972e24, moons: 1, orbital_period: 365, rate_solar_rotation: 108000, distance_from_the_sun: 92.96e6}
+mars = {name: "Mars", diameter: 4212, mass: 6.39e23, moons: 2, orbital_period: 687, rate_solar_rotation: 86400, distance_from_the_sun: 141.6e6}
+jupiter = {name: "Jupiter", diameter: 86881.4, mass: 1.898e27, moons: 63, orbital_period: 4380, rate_solar_rotation: 47160, distance_from_the_sun: 483.8e6}
+saturn = {name: "Saturn", diameter: 72367.4, mass: 5.683e26, moons: 62, orbital_period: 10585, rate_solar_rotation: 34884, distance_from_the_sun: 890.7e6}
+uranus = {name: "Uranus", diameter: 31518, mass: 8.681e25, moons: 27, orbital_period: 30660, rate_solar_rotation: 24607, distance_from_the_sun: 1.787e9}
+neptune = {name: "Neptune", diameter: 30599, mass: 1.024e26, moons: 13, orbital_period: 60225, rate_solar_rotation: 19720, distance_from_the_sun: 2.795e9}
+
+mercury_planet = Planet.new(mercury)
+venus_planet = Planet.new(venus)
+earth_planet = Planet.new(earth)
+mars_planet = Planet.new(mars)
+jupiter_planet = Planet.new(jupiter)
+saturn_planet = Planet.new(saturn)
+uranus_planet = Planet.new(uranus)
+neptune_planet = Planet.new(neptune)
+
+this_solar_system.add_one_planet(mercury_planet)
+this_solar_system.add_one_planet(venus_planet)
+this_solar_system.add_planet_array([earth_planet, mars_planet, jupiter_planet, saturn_planet, uranus_planet, neptune_planet])
+this_solar_system.print_out
+puts
+mercury_planet.orbits_around
+mercury_planet.orbits_around("Mickey Mouse")
+puts
+this_solar_system.distance_between(mercury_planet, venus_planet)
+puts

solar_system.rb

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+class SolarSystem
+attr_reader :name, :planets_array
+  def initialize(name, formation_year)
+    @name = name
+    @planets = []
+    @formation_year = formation_year
+  end
+
+  def add_one_planet(planet)
+    @planets.push(planet)
+  end
+
+  def add_planet_array(array)
+    array.each do |planet|
+      @planets.push(planet)
+    end
+  end
+
+  def distance_between(planet_1, planet_2)
+    difference = (planet_1.distance_from_the_sun - planet_2.distance_from_the_sun).to_i.abs
+    puts "The distance between #{planet_1.name} and #{planet_2.name} is #{difference} miles."
+  end
+
+  def print_out
+    puts "This is a solar system named #{@name}.  Its formation occurred #{@formation_year.to_i} Earth Years ago."
+    puts "#{@name} contains the following planets:"
+
+    @planets.each do |planets|
+      puts planets.name
+    end
+  end
+end