World settings for animation

I’m trying to create an animation of an asteroid powered space ship with a stary background
I added a planet earth to the world background image as I found this the best way to get the planet to look right as I flew by
As the camera angle changes I need to set the world texture settings so the background works properly with the camera
I have done the settings as well as I can but I get the image (complete with planet) repeated - once in front of my ship and once behind with a sort of streached looking bit either side of my ship
I enclose an image of my settings (in the ‘map to’ tab I have selected ‘hori’) can someone have a look and see what I’ve done wrong?
thanks

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