Unable to detect collision in 2d game please help!!

Questions & Answers
1

i have a rocket and some planets, i have attached colliders on both and both are rigid bodies.
but i am not able to detect collisions. here is the script .PLEASE HELP!!
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityStandardAssets.CrossPlatformInput;

public class RocketController : MonoBehaviour {

    
    public float speed;
    private Rigidbody2D rgbd;
    // Use this for initialization
	void Start () {
        rgbd = GetComponent<Rigidbody2D>();
        
	}
	
	// Update is called once per frame
	void Update () {
       
        
            Vector2 moveVec = new Vector2(CrossPlatformInputManager.GetAxis("Horizontal"),
            CrossPlatformInputManager.GetAxis("Vertical"));
            Debug.Log(moveVec);

            Vector3 lookVec = new Vector3(CrossPlatformInputManager.GetAxis("Horizontal"),
                CrossPlatformInputManager.GetAxis("Vertical"), 4000);

            transform.rotation = Quaternion.LookRotation(lookVec, Vector3.back);
            transform.Translate(moveVec * Time.deltaTime * speed, Space.World);
            
          
       
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        if(collision.gameObject.tag=="planet")
        {
            Destroy(collision.gameObject);
        }
    }
2

@z4zion try turn off rotation, i have same problem with my rotation script, player ignores other objects when turned on.