diff --git a/Solar_system.rb b/Solar_system.rb
new file mode 100644
index 00000000..a0953d44
--- /dev/null
+++ b/Solar_system.rb
@@ -0,0 +1,126 @@
+class SolarSystem
+
+  def initialize(all_planets)
+    @planets = all_planets
+  end
+
+  attr_accessor :planets
+
+  def planet_list
+    planet_names = [ ]
+    i = 0
+    @planets.each do |planet_name|
+      planet_names << "#{i+1}. #{planet_name.name}"
+      i += 1
+    end
+    puts planet_names
+  end
+end
+
+
+class Planet
+
+  def initialize(input_name, input_diameter, input_distance_from_sun, input_orbit_period, input_number_of_moons, input_mean_temp)
+    @name = input_name
+    @diameter = input_diameter
+    @distance_from_sun = input_distance_from_sun
+    @orbit_period = input_orbit_period
+    @moons = input_number_of_moons
+    @mean_temp = input_mean_temp
+  end
+
+  attr_reader :name, :diameter, :distance_from_sun, :orbit_period, :moons, :mean_temp
+
+  def planet_summary
+    puts "\nHere are some fun facts about #{@name}:
+    Diameter: #{@diameter}
+    Distance from Sun: #{@distance_from_sun} AU
+    Orbit Period: #{@orbit_period}
+    Number of moons: #{@moons}
+    Mean temperature: #{@mean_temp}°C"
+  end
+
+end
+
+def add_planet
+  puts "\nWe will need you to enter a few facts about your planet:"
+  print "Name: "
+  new_planet_name = gets.chomp.capitalize
+  print "Enter the diameter in km: "
+  new_diameter = gets.chomp
+  print "Distance from the sun in AU: "
+  new_distance_from_sun = gets.chomp.to_f
+  print "Orbit period in days: "
+  new_orbit = gets.chomp
+  print "Number of moons: "
+  new_number_of_moons = gets.chomp
+  print "Mean temperature in °C: "
+  new_mean_temp = gets.chomp
+  puts "\nThank you for adding a new planet to our directory!"
+  return Planet.new(new_planet_name, new_diameter, new_distance_from_sun, new_orbit, new_number_of_moons, new_mean_temp)
+end
+
+objects_of_planets_class = [
+  Planet.new("Mercury", "4,879 km", 0.39, "88 days", 0, 167),
+  Planet.new("Venus", "12,104 km", 0.73, "225 days", 0, 464),
+  Planet.new("Earth", "12,742 km", 1, "365 days", 1, 15),
+  Planet.new("Mars", "6,779 km", 1.38, "1.9 years", 2, -65),
+  Planet.new("Jupiter", "139,822 km", 5.20, "29.5 years", 67, -110), Planet.new("Hoth", "5,030 km", 7.30, "32 years", 3, -60)
+]
+
+explora_solar_system = SolarSystem.new(objects_of_planets_class)
+
+def valid(max)
+  selection = gets.chomp.to_i
+  until (1..max).include?(selection)
+    print "Enter valid choice: "
+    selection = gets.chomp.to_i
+  end
+  return selection
+end
+
+# Introduction for user. Informs user that they can view existing planet or add new planet.
+puts "\n\n🚀 ✨ 💫  EXPLORA 💫 ✨ 🚀\n\nWelcome to the Solar System of Explora! Learn about any of the existing 6 planets or add your own!\n"
+
+continue = " "
+while continue != "n"
+  # List of options of what user can do.
+  puts "\nHere are your options:\n\n1. Learn about a planet\n2. Create new planet\n3. Exit\n\n"
+
+  # User prompted to enter number of action they want to complete.
+  print "Enter the number of your choice: "
+
+  # User will get error if they don't enter a valid choice (1,2 or 3)
+  selection = valid(3)
+  if selection == 1
+    puts "\nThese are the current planets in our Solar System:\n"
+    # If user selects learn more about a planet a list of current planets in solar system are printed
+    explora_solar_system.planet_list
+
+    # Prompt user to enter name of planet to view, or add a new planet
+    print "\nEnter the number corresponding to the planet you would like to learn more about: "
+
+    # User will be asked to enter valid number if it's not within length of planets in solar system array
+    planet_selection = valid(objects_of_planets_class.length)
+    planet_selection -= 1
+    # Summary of planet of choice is printed
+    objects_of_planets_class[planet_selection].planet_summary
+  elsif selection == 2
+    # User prompted to enter new planet information
+    new_planet = add_planet
+    objects_of_planets_class.push(new_planet)
+  else selection == 3
+    # Program will exit if user selects choice 3 'exit'
+    exit
+  end
+
+  # User is asked if they want to continue using program. If yes, the options of actions are listed again.
+  print "\nWould you like to continue using Explora (y/n): "
+  continue = gets.chomp.downcase
+  valid_continue_options = ["y", "n"]
+  until valid_continue_options.include? continue
+    print "Enter if you want to continue (y or n): "
+    continue = gets.chomp.downcase
+  end
+
+end