// ...
var geometry = new THREE.SphereBufferGeometry( 500, 60, 40 );
// invert the geometry on the x-axis so that all of the faces point inward
geometry.scale( - 1, 1, 1 );

var texture = new THREE.TextureLoader().load( 
             'textures/2294472375_24a3b8ef46_o.jpg' );
var material = new THREE.MeshBasicMaterial( { map: texture } );
mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
// ...

// ...
var geometry = new THREE.SphereBufferGeometry( 500, 60, 40 );

var texture = new THREE.TextureLoader().load( 
             'textures/2294472375_24a3b8ef46_o.jpg' );
var material = new THREE.MeshBasicMaterial( { map: texture,
                                              side: THREE.BackSide } );
mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
// ...