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..
Dictionary entry overview: What does astronomy mean? â¢ ASTRONOMY (noun) The noun ASTRONOMY has 1 sense: 1. the branch of physics that studies celestial bodies and the universe as a whole Familiarity information: ASTRONOMY used as a noun is very rare.