Quote:
Originally Posted by AnotherCat
You do not give what frame of reference you are using in stating that speed, it is meaningless unless you state a frame of reference.
However, I will assume that you are referring to our galaxy's motion against the cosmic background radiation (the radiation remnant of the "Big Bang") which approximates the figure you have given. If that is the case then the speed you quote has nothing to do with the expansion of the universe, it is a local effect due to the gravitational influence of other nearby galaxies and matter.
EDIT: added "it is a local effect"
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Exactly, and the expansion of the universe doesn't impart any speed to galaxies' motion. While distant galaxies appear to be moving away from us at high speeds, they're not actually moving that fast, any more than we are, even though we appear to be to them.