Hi, Dave.
A body travelling in a straight line will have a constant, non-zero angular momentum.
In physics, angular momentum is defined to be the cross product of the position vector of the body from the origin of the coordinate system with its momentum vector. As the body travels forever, its momentum (in the absense of any forces) will remain constant; its distance will increase, but the angle between the position vector and the momentum vector will decrease, which will compensate in such a way that will keep the angular momentum constant.
Actually, if their god makes better pancakes, I'm totally switching sides. --
Charley the Australopithecine