Of course you could use the moon to move the earth........the gravitational effect of bodies on each other can make substantial changes to their
motion - comets for example, or how we discovered Neptune (which perhaps wasn't so major...).
But to get it to do something other than it is doign right now you'd have to move the moon first, and while it might be smaller than the earth, it
ain't a speck of dust!
so I imagine if you wanted to pull the earth further from the sun you'd move the moon to a position just ahead of the earth in its orbit, thus
speeding the earth up in its orbit, which would then move it further from the sun.
Or to move closer to the sun put the moon just "behind" the earth - slowing it down.
But I think it is much easier to say than do!!


edit on 11-12-2011 by Aloysius the Gaul because: (no reason given)