Created planet.rb, solar_system.rb, and main.rb to display name of pl…

…anet -Wave 2 completed requirement 4

lib/main.rb

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+require_relative "planet.rb"
+require_relative "solar_system.rb"
+
+def main
+  solar_system = SolarSystem.new("Sun")
+
+  mercury = Planet.new("Mercury", "dark grey", 4.867e24, 5.791e7, "Mercury is the smallest plannet in our solar system")
+  solar_system.add_planet(mercury)
+
+  saturn = Planet.new("Saturn", "yellowish-brown", 5.683e26, 1.434e9, "Saturn is the second largest planet in our solar system")
+  solar_system.add_planet(saturn)
+
+  list = solar_system.list_planets
+
+  puts list
+end
+
+main

lib/planet.rb

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+class Planet
+  attr_reader :name, :color, :mass_kg, :distance_from_sun_km, :fun_fact
+
+  def initialize(name, color, mass_kg, distance_from_sun_km, fun_fact)
+    @name = name
+    @color = color
+    @mass_kg = mass_kg
+    @distance_from_sun_km = distance_from_sun_km
+    @fun_fact = fun_fact
+  end
+
+  def summary
+    return "Planet #{name} has the color of #{color} with the mass of #{mass_kg} kgs. This planet is #{distance_from_sun_km} km from the sun. A fun-fact about this planet is: #{fun_fact}"
+  end
+end
+
+#  earth = Planet.new("Earth", "blue-green", 5.972e24, 1.496e8, "Only planet known to support life")
+
+# puts earth.name
+# puts earth.fun_fact
+
+# earth.color = "pink"

lib/solar_system.rb

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+
+class SolarSystem
+  attr_reader :star_name, :planet
+
+  def initialize(star_name)
+    @star_name = star_name
+    @planets = []
+  end
+
+  def add_planet(planet_instance)
+    @planets << planet_instance
+  end
+
+  def list_planets
+    conclusion_statement = "Planets orbiting #{star_name}:\n"
+
+    i = 1
+    planet_list = ""
+    @planets.each do |planet|
+      planet_list += "#{i}.#{planet.name} \n"
+      i += 1
+    end
+
+    return conclusion_statement + planet_list
+  end
+
+  def find_planet_by_name(planet_name)
+    lower_case_planet_name = planet_name.downcase
+    @planets.each do |planet|
+      if planet == lower_case_planet_name
+        return planet
+      end
+    end
+  end
+end
+
+# earth = Planet.new("Earth", "blue-green", 5.972e24, 1.496e8, "Only planet known to support life")