diff --git a/core/src/sagittarius/model/Arrow.java b/core/src/sagittarius/model/Arrow.java
index b1caf52..450b7cc 100644
--- a/core/src/sagittarius/model/Arrow.java
+++ b/core/src/sagittarius/model/Arrow.java
@@ -16,9 +16,9 @@ public class Arrow extends Actor {
 
 // ---------- ATTRIBUTEs ----------
 
-    private Vector2 velocity = new Vector2();
-    private Vector2 acceleration = new Vector2();
-    private Vector2 force = new Vector2();
+    private Vector2 velocity;
+    private Vector2 acceleration;
+    private Vector2 force;
 
     private float TTL = 20;
 
@@ -56,10 +56,11 @@ public class Arrow extends Actor {
         for (Actor actor : GameScreen.planets.getChildren()) {
             
             float dx = actor.getX() - this.getX();
-            float dy = actor.getX() - this.getX();
+            float dy = actor.getY() - this.getY();
             
             float len2 = dx*dx + dy*dy;
-            float coeff = SagittariusGame.G * ((Planet) actor).getMass() * (float) Math.pow(len2, -3/2);
+            
+            float coeff = (float) (SagittariusGame.G * ((Planet) actor).getMass() * Math.pow(len2, -3/2));
 
             float gravityX = coeff * dx;
             float gravityY = coeff * dy;