Unity freezes after I made a new script when i try to run game,

Trying to make a procedurally generated asteroid field anyone know why this freezes unity up completely to the point i have to end task when i run game? This is attached to an empty object I called GenerationCore...

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GenerationCore : MonoBehaviour
 {
     public GameObject asteroid1Prefab;
     public GameObject asteroid2Prefab;
     public GameObject asteroid3Prefab;
     public Vector3 solarSystemRange;
 
     void Start()
     {
         GenerateSolarSystem();
     }
 
     void Update()
     {
 
     }
 
     public void GenerateSolarSystem()
     {
         int amountOfAsteroidBelts = (Random.Range(1, 10));
         Debug.Log("Asteroid Belt Generation Roll: " + amountOfAsteroidBelts);
         if (amountOfAsteroidBelts > 0)
         {
             GenerateAsteroidBelts(amountOfAsteroidBelts);
         }
     }
 
     public void GenerateAsteroidBelts(float _amountofAsteroidBelts)
     {
         GameObject newAsteroidBelt;
         Vector3 newAsteroidBeltLocation;
         float asteroidBeltDensity;
         Vector3 asteroidBeltRange;
         float placeAsteroidChance;
         float placeWhichAsteroid;
         Vector3 asteroidPlacementPosition;
         float placedAsteroids = 0;
         GameObject asteroidToInstantiate = asteroid1Prefab;
         int avoidInfiniteLoop = 1;
         for(int generatingAsteroidBelt = 1; generatingAsteroidBelt < _amountofAsteroidBelts; generatingAsteroidBelt++)
         {
             newAsteroidBeltLocation.x = Random.Range(0, solarSystemRange.x);
             newAsteroidBeltLocation.y = Random.Range(0, solarSystemRange.y);
             newAsteroidBeltLocation.z = Random.Range(0, solarSystemRange.z);
             newAsteroidBelt = new GameObject("Asteroid Belt");
             newAsteroidBelt.transform.position = newAsteroidBeltLocation;
             asteroidBeltDensity = Random.Range(50, 2500);
             asteroidBeltRange.x = asteroidBeltDensity * 100;
             asteroidBeltRange.y = asteroidBeltDensity * 100;
             asteroidBeltRange.z = asteroidBeltDensity * 100;
             Debug.Log("Asteroid Belt Generated! Placing asteroids...");
             //while (placedAsteroids < asteroidBeltDensity && avoidInfiniteLoop < 1000)
             //{
                 for (int PositionX = 0; PositionX < asteroidBeltRange.x; PositionX += 10)
                 {
                     for (int PositionY = 0; PositionY < asteroidBeltRange.y; PositionY += 10)
                     {
                         for (int PositionZ = 0; PositionZ < asteroidBeltRange.z; PositionZ += 10)
                         {
                             if (placedAsteroids < asteroidBeltDensity)
                             {
                             placeAsteroidChance = Random.Range(1, 10000);
                             if (placeAsteroidChance > 9998)
                             {
                                 // determine which asteroid to place
                                 placeWhichAsteroid = Random.Range(1, 3);
                                 if (placeWhichAsteroid == 1) asteroidToInstantiate = asteroid1Prefab;
                                 if (placeWhichAsteroid == 2) asteroidToInstantiate = asteroid2Prefab;
                                 if (placeWhichAsteroid == 3) asteroidToInstantiate = asteroid3Prefab;
                                 // get location
                                 asteroidPlacementPosition.x = PositionX;
                                 asteroidPlacementPosition.y = PositionY;
                                 asteroidPlacementPosition.z = PositionZ;
                                 // place asteroid
                                 GameObject newAsteroid = Instantiate(asteroidToInstantiate, (newAsteroidBelt.transform.position + asteroidPlacementPosition), Quaternion.identity) as GameObject;
                                 newAsteroid.transform.parent = newAsteroidBelt.transform;
                                 placedAsteroids = placedAsteroids + 1;
                                 newAsteroid.name = "Asteroid #" + placedAsteroids;
                             }
                         }
                             
                         }
                     }
                 }
                 avoidInfiniteLoop += 1;
            // }
             Debug.Log("Asteroids Generated! Total: " + placedAsteroids + ", Passes: " + avoidInfiniteLoop);
             //exit while
         }
     }
 
 
 
 
 
 
 }

,Anyone know why this code is freezing my unity program when I start the game? I took out the while loop and it still does it, not the best at programming but trying to make procedural generation...

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class GenerationCore : MonoBehaviour
 {
     public GameObject asteroid1Prefab;
     public GameObject asteroid2Prefab;
     public GameObject asteroid3Prefab;
     public Vector3 solarSystemRange;
 
     void Start()
     {
         GenerateSolarSystem();
     }
 
     void Update()
     {
 
     }
 
     public void GenerateSolarSystem()
     {
         int amountOfAsteroidBelts = (Random.Range(1, 10));
         Debug.Log("Asteroid Belt Generation Roll: " + amountOfAsteroidBelts);
         if (amountOfAsteroidBelts > 0)
         {
             GenerateAsteroidBelts(amountOfAsteroidBelts);
         }
     }
 
     public void GenerateAsteroidBelts(float _amountofAsteroidBelts)
     {
         GameObject newAsteroidBelt;
         Vector3 newAsteroidBeltLocation;
         float asteroidBeltDensity;
         Vector3 asteroidBeltRange;
         float placeAsteroidChance;
         float placeWhichAsteroid;
         Vector3 asteroidPlacementPosition;
         float placedAsteroids = 0;
         GameObject asteroidToInstantiate = asteroid1Prefab;
         int avoidInfiniteLoop = 1;
         for(int generatingAsteroidBelt = 1; generatingAsteroidBelt < _amountofAsteroidBelts; generatingAsteroidBelt++)
         {
             newAsteroidBeltLocation.x = Random.Range(0, solarSystemRange.x);
             newAsteroidBeltLocation.y = Random.Range(0, solarSystemRange.y);
             newAsteroidBeltLocation.z = Random.Range(0, solarSystemRange.z);
             newAsteroidBelt = new GameObject("Asteroid Belt");
             newAsteroidBelt.transform.position = newAsteroidBeltLocation;
             asteroidBeltDensity = Random.Range(50, 2500);
             asteroidBeltRange.x = asteroidBeltDensity * 100;
             asteroidBeltRange.y = asteroidBeltDensity * 100;
             asteroidBeltRange.z = asteroidBeltDensity * 100;
             Debug.Log("Asteroid Belt Generated! Placing asteroids...");
             //while (placedAsteroids < asteroidBeltDensity && avoidInfiniteLoop < 1000)
             //{
                 for (int PositionX = 0; PositionX < asteroidBeltRange.x; PositionX += 10)
                 {
                     for (int PositionY = 0; PositionY < asteroidBeltRange.y; PositionY += 10)
                     {
                         for (int PositionZ = 0; PositionZ < asteroidBeltRange.z; PositionZ += 10)
                         {
                             if (placedAsteroids < asteroidBeltDensity)
                             {
                             placeAsteroidChance = Random.Range(1, 10000);
                             if (placeAsteroidChance > 9998)
                             {
                                 // determine which asteroid to place
                                 placeWhichAsteroid = Random.Range(1, 3);
                                 if (placeWhichAsteroid == 1) asteroidToInstantiate = asteroid1Prefab;
                                 if (placeWhichAsteroid == 2) asteroidToInstantiate = asteroid2Prefab;
                                 if (placeWhichAsteroid == 3) asteroidToInstantiate = asteroid3Prefab;
                                 // get location
                                 asteroidPlacementPosition.x = PositionX;
                                 asteroidPlacementPosition.y = PositionY;
                                 asteroidPlacementPosition.z = PositionZ;
                                 // place asteroid
                                 GameObject newAsteroid = Instantiate(asteroidToInstantiate, (newAsteroidBelt.transform.position + asteroidPlacementPosition), Quaternion.identity) as GameObject;
                                 newAsteroid.transform.parent = newAsteroidBelt.transform;
                                 placedAsteroids = placedAsteroids + 1;
                                 newAsteroid.name = "Asteroid #" + placedAsteroids;
                             }
                         }
                             
                         }
                     }
                 }
                 avoidInfiniteLoop += 1;
            // }
             Debug.Log("Asteroids Generated! Total: " + placedAsteroids + ", Passes: " + avoidInfiniteLoop);
             //exit while
         }
     }
 
 
 
 
 
 
 }