sphere = {
const geometry = new THREE.SphereGeometry(0.7, 30, 15);
const material = new THREE.MeshStandardMaterial();
const sphereMesh = new THREE.Mesh(geometry, material);
material.map = new THREE.TextureLoader().load(earthImageUrl);
const wireframe = new THREE.EdgesGeometry(geometry);
const wireframeMaterial = new THREE.LineBasicMaterial({ color: 0xffffff });
const wireframeMesh = new THREE.LineSegments(wireframe, wireframeMaterial);
sphereMesh.add(wireframeMesh);
return sphereMesh;
}