up vote 1 down vote. 2D cross products are more properly called 2d wedge products. Wedge products generalize to other dimensions, but cross products are always 3d wedge products. The usual operator symbol for a wedge product is ^ . You can use 2d wedge products to determine if one vector is to the left or the right of another one. If vector A is to the right of vector B, then, if A is to the left. If they are parallel or either of them is 0, then A ^ B = 0. In vector graphics, 2d wedge products can be used to analyze the intersection of 2 parametrized curves, e.g. for removing portions of one curve that lies to the right of another.
Definition of morning star for Students. : a bright planet (as Venus) seen in the eastern sky before or at sunrise.
It is the conjoined representation of the crescent and a star, both of which constituent elements have a long prior history in the iconography of the Ancient Near East as representing either Sun and Moon, or Moon and Morning Star (or their divine personifications).