Faux Gravity help

I have recently been experimenting with spherical planet gravity (faux gravity), similar to what exists in Super Mario Galaxy. However, as my player rotates around the planet, it slowly moves further and further away - (https://gfycat.com/BitesizedWellgroomedGrassspider).

Why is this occuring? Below I have included both scripts I use. One is for player movement and the other is for gravity. Does it relate to my gravity? Or my player movement not being compatible with my gravity? Any suggestions?

GRAVITY

 using UnityEngine;
 using System.Collections;
 
 public class PlayerGravity : MonoBehaviour 
 {
     #region Variables
     //Private var
     public GameObject currentPlanet;
     private float damping = 8;
 
     //Public var
     public GameObject groundCheck;
     public LayerMask planet;
     public float groundCheckRadius;
     public float gravity;
     #endregion
 
     void FixedUpdate () 
     {
         //Direction from player to planet
         Vector3 dir = (transform.position - currentPlanet.transform.position).normalized;//CheckForGroundContact().transform.position );
         //Position of player
         Vector3 origin = transform.position;
         //Direction upwards;
         transform.up = Vector3.Slerp(transform.up, dir, Time.deltaTime * damping);
 
     }
 }
 

PLAYER MOVEMENT

 using UnityEngine;
 using System.Collections;
 
 public class PlayerBehaviour : MonoBehaviour 
 {
     void Update () 
     {
         Vector3 move = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
         transform.Translate(move * 10 * Time.deltaTime);
     }
 }