Quote:
Originally Posted by pzkpfw
If you like, make the angle between the lines A-B-C and X-Y-Z smaller than 90o; and the distances between letters "small enough" so that C-Z is within the visible universe. (It occurs that since C-Z gets smaller, Z comes into the visible universe anyway - we'd be seeing MORE as time passes).
The point is that objects moving towards a point source will get closer in the direction perpendicular to the direction to the point source..
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As you make the angles small enough at one point the hypotinuse becomes equal to the leg. All you need to do is make this far enough away that gravitational acceleration can make the difference in angle imaterial. and this would be in 3d.