universology

from The Century Dictionary.

• noun The science of the universe, or of the whole system of created things; a science covering the whole ground of philosophy, of the sciences in their general aspects, and of social polity, or the collective life of the human world.

from the GNU version of the Collaborative International Dictionary of English.

• noun The science of the universe, and the relations which it involves.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun sometimes capitalized The science of the universe.