If you replace the czml loader at the bottom with czml_working, you can see that the moon image loads, but when the position is cartesian over time, it will fail and just show the default white ellipsoid (use czml_failing).
If you replace the czml loader at the bottom with czml_working, you can see that the moon image loads, but when the position is cartesian over time, it will fail and just show the default white ellipsoid (use czml_failing).