These are my planet and solar system class objects.

planet.rb

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+# GOOD NEWS EVERYONE 
+# Maybe use notable episodes as an attribute, key characters from certain planets, main exports
+# Add in Dogdoo 7 / Joke about Dogdoo 8
+
+require 'pp'
+
+futurama_planets = {
+	"amazonia" => {
+		 name: "Amazonia",
+		 diameter: "4880 km",
+		 mass: "0.0553 10^24 kg",  
+		 moons: "2",
+		 atmosphere: true,
+		 rotation: "58.81 hours",
+		 revolution: "87.97 days",
+		 distance_from_sun: "0.387 astronomical units", # 1 AU = 149.6 million kilometers
+		 has_life: "Giant Man-Hating Women"
+	},
+	"amphibios_9" => {
+		 name: "Amphibios 9",
+		 diameter: "3290 km",
+		 mass: "0.0343 10^24 kg",  
+		 moons: "0",
+		 atmosphere: true,
+		 rotation: "47.81 hours",
+		 revolution: "176.97 days",
+		 distance_from_sun: "0.182 astronomical units",
+		 has_life: "Kif, Amphibiosans"
+	},
+	"colgate_8" => {
+		 name: "Colgate 8",
+		 diameter: "1260 km",
+		 mass: "0.0129 10^24 kg",  
+		 moons: "12",
+		 atmosphere: false,
+		 rotation: "12.31 hours",
+		 revolution: "375.12 days",
+		 distance_from_sun: "3.298 astronomical units",
+		 has_life: "Toothbrushes"
+	},
+  "decapod_10" => {
+	   name: "Decapod 10",
+  	 diameter: "12,360 km",
+  	 mass: "1.129 10^24 kg",  
+	   moons: "2",
+  	 atmosphere: true,
+	   rotation: "23.31 hours",
+	   revolution: "388.14 days",
+  	 distance_from_sun: "2.597 astronomical units",
+	   has_life: "Zoidberg, Decapodians"
+	},
+	"earth" => {
+		 name: "Earth",
+		 diameter: "12,742 km",
+		 mass: "1.000 10^24 kg",  
+		 moons: "1",
+		 atmosphere: true,
+		 rotation: "23.93 hours",
+		 revolution: "365.26 days",
+		 distance_from_sun: "1.524 astronomical units",
+		 has_life: "Humans, Richard Nixon's Head"
+	},
+	"nerdanus_8" => {
+		 name: "Nerdanus 8",
+		 diameter: "45,960 km",
+		 mass: "3.929 10^24 kg",  
+		 moons: "18",
+		 atmosphere: true,
+		 rotation: "87.31 hours",
+		 revolution: "985.14 days",
+		 distance_from_sun: "7.982 astronomical units",
+		 has_life: "The planet itself is a sentient nerd."
+	},
+	"omicron_persei_8" => {
+		 name: "Omicron Persei 8",
+		 diameter: "7305 km",
+		 mass: "4.829 10^24 kg",  
+		 moons: "3",
+		 atmosphere: true,
+		 rotation: "26.31 hours",
+		 revolution: "295.12 days",
+		 distance_from_sun: "2.471 astronomical units",
+		 has_life: "Omicronians"
+	},
+	"wormulon" => {
+		 name: "Wormulon",
+		 diameter: "1811 km",
+		 mass: "0.0132 10^24 kg",  
+		 moons: "0",
+		 atmosphere: true,
+		 rotation: "90.31 hours",
+		 revolution: "103.12 days",
+		 distance_from_sun: "1.930 astronomical units",
+		 has_life: "Slurm Worms"
+	},
+}
+
+dogdoo_8 = {
+		 name: "DogDoo 8",
+		 diameter: nil,
+		 mass: nil,  
+		 moons: nil,
+		 atmosphere: nil,
+		 rotation: nil,
+		 revolution: nil,
+		 distance_from_sun: 0,
+		 has_life: nil
+}
+
+class Planet
+
+	attr_reader :name, :diameter, :mass, :moons,
+							:atmosphere, :rotation, :revolution,
+							:distance_from_sun, :has_life
+
+	def initialize(planets)
+	 @name = planets[:name]
+	 @diameter = planets[:diameter]
+	 @mass = planets[:mass]
+	 @moons = planets[:moons]
+	 @atmosphere = planets[:atmosphere]
+	 @rotation = planets[:rotation]
+	 @revolution = planets[:revolution]
+	 @distance_from_sun = planets[:distance_from_sun] # 1 AU = 149.6 million kilometers
+	 @has_life = planets[:has_life]
+	end
+end
+
+class SolarSystem
+
+	attr_accessor :planets_array
+
+	def initialize(planets_array)
+		@planets_array = planets_array
+	end
+end
+
+# give the planet hash list the class Planet
+def assign_planets(planets)
+	planet_array = []
+	planets.each do |key, value|
+		planet_array << Planet.new(value)
+	end
+	return planet_array
+end
+
+#add in a single planet to an already established planet collection 
+def add_planet(planet, planets_array)
+	planet = Planet.new(planet)
+	planets_array << planet
+	return planets_array
+end 
+
+
+# assign planet class to planets
+futurama_planet_array = assign_planets(futurama_planets)
+
+# assign SolarSystem class to the planet array 
+futurama_solar_system = SolarSystem.new(futurama_planet_array)
+
+# add a planet to the exsting array of planets 
+futurama_planet_array = add_planet(dogdoo_8, futurama_planet_array)