I need a short animated clip with a globe rotating/moving in space. Anyone who knows where to buy such a clip in PAL (Quicktime mov).?

Check this company out (http://www.digiwis.com/dwi_agt.htm)

Check out this free real time 3D space simulation.
http://www.shatters.net/celestia/
It's similar to a planetarium.
I wouldn't know how to record the spining globe but you're probably more computer savy than I am.
Once you download it, run the demo under help.
Sit back and enjoy.

Check this site out

http://earthobservatory.nasa.gov/Newsroom/BlueMarble/

The QT and MPEG versions you can download have some weird-ass stuttering problems and are not usable. However, if you contact the person directly, they will let you have access to their FTP site for a much larger and supposedly cleaner version of the earth rotation. I haven't had the time to do it myself, so I don't know if the weird-ass stutter shows up in their "large" version or not.

I've used the Blue Marble stuff mentioned by Stephen with great success. If you go to www.ruyitang.com and click on the India video, you'll see an opening sequence that I created using the Nasa stuff. The two globes are stills from the site. The moving earth beneath them was created using a still from the site, panning across it using the Motion filter in Premiere, carefully looping the end result and then applying some Gaussian blur. If you want just a pure, rotating earth in space, instead of downloading the one on the Blue Marble site, send in an email request for the uncompressed video. They'll email you back with a url where you can download it. It takes a couple of days to get the email response back, and then quite a while to downloadm the file, but it's worth it -- very good resolution and no stuttering at all.