Mars made its closest approach to Earth and maximum apparent brightness in nearly 60,000 years, 55,758,006 km (0.37271925 AU; 34,646,419 mi), magnitude â2.88, on August 27, 2003 at 9:51:13 UT.
Pertaining to the universe, and having special reference to universal law or order, or to the one grand harmonious system of things; hence; harmonious; orderly. Pertaining to the solar system as a whole, and not to the earth alone. Characteristic of the cosmos or universe; inconceivably great; vast; as, cosmic speed..
Definition of theoretical. 1a : relating to or having the character of theory : abstractb : confined to theory or speculation often in contrast to practical applications : speculative theoretical physics.