NASA Space Shuttle Launch ......?

I was recently looking at an image in the NASA.GOV website...... it was an image of the STS-128 Discovery Launch at Midnight Saturday that image was constructed putting together various still images of the shuttle's fire-lit launch path. I've noticed that the launch path itself looks like it's... show more I was recently looking at an image in the NASA.GOV website......

it was an image of the STS-128 Discovery Launch at Midnight Saturday
that image was constructed putting together various still images of the shuttle's fire-lit launch path. I've noticed that the launch path itself looks like it's arching over the horizon instead of just going straight up..

..Why is this so ???
Update: ummm goo goo
actually i meant the launch trail or path
when you look at the picture, as the shuttle leaves after 5 minutes it seems that it arches over the horizon instead of seeing it blast straight up thru the sky.....not the launch pad.
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