Add solar system files

Planet.rb

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+class Planet
+  attr_reader :name, :diameter, :weight_multiplier, :num_moons, :rate_solar_rotation, :distance_from_sun
+
+  def initialize(info_hash)
+    @name = info_hash[:name]
+    @diameter = info_hash[:diameter]
+    @weight_multiplier = info_hash[:weight_multiplier]
+    @num_moons = info_hash[:num_moons]
+    @rate_solar_rotation = info_hash[:rate_solar_rotation]
+    @distance_from_sun = info_hash[:distance_from_sun]
+  end
+
+#using a default value attribute
+  def weight_on_planet(my_weight = 100)
+    if my_weight != 100
+      puts "Your weight on #{@name} is #{@weight_multiplier * my_weight}lbs."
+    else
+      puts "If your weight was 100lbs on Earth, your weight on #{@name} would be #{@weight_multiplier * my_weight}lbs."
+    end
+  end
+end

SolarSystem.rb

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+class SolarSystem
+
+  def initialize(name, formation_year)
+    @name = name
+    @planets = []
+    @formation_year = formation_year
+  end
+
+  def add_planet(planet)
+    @planets.push(planet)
+  end
+
+  def print_out
+    @planets.each do |planet|
+      puts planet.name
+    end
+  end
+
+  def add_planets(planets_array)
+     planets_array.each do |planet|
+       @planets.push(planet)
+     end
+  end
+
+  def distance_between(planet1, planet2)
+    puts "The distance between #{planet1.name} and #{planet2.name} is #{(planet1.distance_from_sun.to_i - planet2.distance_from_sun.to_i).abs} km."
+  end
+
+#NEED TO FINISH THIS
+  def local_year(planet)
+    puts "The local year on #{planet.name} is #{(((Time.now.year - @formation_year) * 365.25)/planet.rate_solar_rotation + @formation_year).to_i}."
+  end
+
+end

solar_system_program.rb

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+#tests that solar system wave 2 requirements are met
+
+require "./SolarSystem.rb"
+require "./Planet.rb"
+
+#data
+mercury = Planet.new({
+  name: "Mercury",
+  diameter: "4,878 km",
+  weight_multiplier: 0.38,
+  num_moons: 0,
+  rate_solar_rotation: 87.96,
+  distance_from_sun: 57900000
+})
+venus = Planet.new({
+  name: "Venus",
+  diameter: "12,100 km",
+  weight_multiplier: 0.88,
+  num_moons: 0,
+  rate_solar_rotation: 224.68,
+  distance_from_sun: 108200000
+})
+
+earth = Planet.new({
+  name: "Earth",
+  diameter: "12,756 km",
+  weight_multiplier: 1,
+  num_moons: 1,
+  rate_solar_rotation: 365.25,
+  distance_from_sun: 149600000
+})
+
+mars = Planet.new({
+  name: "Mars",
+  diameter: "6,785 km",
+  weight_multiplier: 0.38,
+  num_moons: 2,
+  rate_solar_rotation: 686.98,
+  distance_from_sun: 227900000
+})
+
+jupiter = Planet.new({
+  name: "Jupiter",
+  diameter: "139,822 km",
+  weight_multiplier: 2.36,
+  num_moons: 67,
+  rate_solar_rotation: 4380,
+  distance_from_sun: 778300000
+})
+
+saturn = Planet.new({
+  name: "Saturn",
+  diameter: "116,464 km",
+  weight_multiplier: 0.91,
+  num_moons: 62,
+  rate_solar_rotation: 10585,
+  distance_from_sun: 886700000
+})
+
+uranus= Planet.new({
+  name: "Uranus",
+  diameter: "51,488 km",
+  weight_multiplier: 0.89,
+  num_moons: 27,
+  rate_solar_rotation: 30660,
+  distance_from_sun: 1784000000
+})
+
+neptune = Planet.new({
+  name: "Neptune",
+  diameter: "49,493 km",
+  weight_multiplier: 1.13,
+  num_moons: 14,
+  rate_solar_rotation: 60225,
+  distance_from_sun: 4497100000
+})
+
+my_planet = Planet.new({
+  name: "My Planet",
+  diameter: "500 miles",
+  weight_multiplier: 0.76,
+  num_moons: 900,
+  rate_solar_rotation: 365,
+  distance_from_sun: 3089098
+})
+
+#test adding planets, first just one, then an array
+milky_way = SolarSystem.new("Milky Way", 200)
+milky_way.add_planet(my_planet)
+milky_way.print_out()
+puts ""
+planets = [mercury, venus, earth, mars, jupiter, saturn, uranus, neptune]
+milky_way.add_planets(planets)
+milky_way.print_out()
+puts ""
+
+#test using a default value attribute
+my_planet.weight_on_planet(130)
+my_planet.weight_on_planet()
+puts ""
+
+#calculating distance between planets
+milky_way.distance_between(my_planet, mercury)
+milky_way.distance_between(mercury, my_planet)
+milky_way.distance_between(venus, mars)
+
+#caclulating local year
+milky_way.local_year(mercury)
+milky_way.local_year(earth)