asintótico 64
applying a grammatical function of adjetivizacion, using it as an adjective, the asymptotic well can be considered ' something that may never settled or known or straining with each discovery, arises another problem to be solved and thus puts SAGAN: "... have an asymptotic approach to the universe... " and this is equivalent to understand that space science is an inexhaustible quarry of discoveries never ever understood.