I made this animation according to a tutorial of tutor4u on youtube. In the package (zip-file) is also a file called backgroundstars.jpg. Maybe the path of the image should be set in the environment section.
Nice, i made that too but cant upload it, yours is way better though
Nice scene, I've made some tweak. Microdisplacement and motion blur https://lh3.googleusercontent.com/-8I0sbVbJQLo/VxabdMPzriI/AAAAAAAAwOs/vbCvK66Dzo4njl6Zc449Lk_0mtanbhJrQCCo/s912-Ic42/B1.jpg