diff --git a/core/src/sagittarius/SagittariusGame.java b/core/src/sagittarius/SagittariusGame.java
index 56a8639..4cc4ce6 100644
--- a/core/src/sagittarius/SagittariusGame.java
+++ b/core/src/sagittarius/SagittariusGame.java
@@ -7,6 +7,9 @@ import sagittarius.view.GameScreen;
 
 public class SagittariusGame extends Game {
 
+    // Constants
+    public static final int G = 100;
+
     private static SagittariusGame game;
     
     public SagittariusGame() {
diff --git a/core/src/sagittarius/view/GameScreen.java b/core/src/sagittarius/view/GameScreen.java
index b0671aa..9846f30 100644
--- a/core/src/sagittarius/view/GameScreen.java
+++ b/core/src/sagittarius/view/GameScreen.java
@@ -12,14 +12,14 @@ public class GameScreen extends BaseScreen {
 
 // ---------- ATTRIBUTEs ----------
 
-    // Constants
-    public static final int G = 100;
-
     // Cursors
     public static Vector2 screenCursor;
     private static Vector3 unprojectedCursor;
 	public static Vector2 worldCursor;
 
+    // planets = attractors for arrows
+    public static Group planets; // TODO: move this in SagittariusGame ?
+
 // ---------- METHODs ----------
 
     @Override
@@ -28,8 +28,7 @@ public class GameScreen extends BaseScreen {
         mainStage.setDebugAll(true); // TODO: disable later
 
         // planets
-
-        Group planets = new Group();
+        planets = new Group();
         
         Planet planet1 = new Planet(new Vector2(400, 400), 1000, 50, Color.BLUE);
         planets.addActor(planet1);