Terra

​Terraor, in the most ancient records, "Earth," is the Throneworld of the Imperium of Man and the original homeworld of Mankind and of their Emperor. 
Humans on Terra 2,000,000 B.D or 4,402,000,000 years after the start of the universe. 
Earth was created 108,151,002 years after the start of the universe 
==​Origin==