<div id="container"></div>

* {
  margin: 0;
  padding: 0;
  outline: 0;
}
html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
#container {
  position: fixed;
  width: 100%;
  height: 100%;
}  

var container = document.getElementById("container");
var width = container.clientWidth;
var height = container.clientHeight;
var aspect = width / height;
var renderer = new THREE.WebGLRenderer();
renderer.setSize(width, height);
container.appendChild(renderer.domElement);

var scene = new THREE.Scene();

var camera = new THREE.PerspectiveCamera(50, aspect, 0.1, 1000);
camera.position.z = 500

system = new THREE.Group(); // planetary system

scene.add(
  new THREE.AmbientLight(0xFFFFFF, 0.2)
);

var light = new THREE.DirectionalLight(0xFFFFFF, 2.5);
light.position.set(1500, 2500, 0);
scene.add(light);

var material = new THREE.MeshLambertMaterial({
  color: 0x0C2D4D
});

var planet = new THREE.Mesh(
  new THREE.IcosahedronGeometry(100, 3),
  material
);

for (var i = 0; i < planet.geometry.vertices.length; i++)
  planet.geometry.vertices[i].multiplyScalar(
    Math.random() * 0.05 + 0.95
  );

planet.geometry.computeFlatVertexNormals();
system.add(planet);

var asteroids = new THREE.Group();

for (var p = 0; p < Math.PI * 2; p = p + Math.random() * 0.15) {
  var asteroid = new THREE.Mesh(
    new THREE.IcosahedronGeometry(8, 0),
    material
  );

  var size = Math.random() * 0.5;
  for (var i = 0; i < asteroid.geometry.vertices.length; i++)
    asteroid.geometry.vertices[i].multiplyScalar(
      Math.random() * 0.5 + size
    );

  rand = Math.random() * 60 - 30;
  asteroid.position.set(200 * Math.sin(p) + rand, rand, 200 * Math.cos(p) + rand);

  asteroid.geometry.computeFlatVertexNormals();
  asteroids.add(asteroid);
}

system.add(asteroids);

system.rotation.x = 0.1;
system.rotation.y = -.3;
system.rotation.z = -0.4;

scene.add(system);

for (i = 0; i < 10; i++) {
  particles = new THREE.Points(
    new THREE.Geometry(),
    new THREE.PointsMaterial({
      size: Math.random() * 5
    })
  );
  for (j = 0; j < 20; j++) {
    var vertex = new THREE.Vector3();
    vertex.x = Math.random() * width * 1.1 - width * 1.1 / 2;
    vertex.y = Math.random() * height * 1.1 - height * 1.1 / 2;
    vertex.z = -500;
    particles.geometry.vertices.push(vertex);
    particles.material.color.setScalar(Math.random() * 0.4 + 0.2);
  }
  scene.add(particles);
}

function render() {
  requestAnimationFrame(render);

  planet.rotation.y += 0.001;
  planet.rotation.z -= 0.0005;

  asteroids.rotation.y += 0.003;

  renderer.render(scene, camera);
}

render();