implement the planets feed

app/controllers/planet_controller.rb

@@ -9,6 +9,6 @@ def index
   end
 
   def feed
-    # TODO implement me
+    @entries = Planet::Models::Entry.order(:published_at => :desc).limit 25
   end
 end

app/views/planet/feed.atom.builder

@@ -0,0 +1,16 @@
+atom_feed do |feed|
+  feed.title(t 'pages.planet.headline')
+  feed.updated(@entries.first.updated_at)
+
+  for entry in @entries
+    feed.entry(entry, :url => entry.url) do |feeditem|
+      feeditem.title(entry.title)
+
+      feeditem.author do |author|
+        author.name entry.author
+      end
+
+      feeditem.content(entry.body, :type => 'html')
+    end
+  end
+end