13,000,000,000 BBY

13,000,000,000 BBY, or 13,000,000,000 Before the Battle of Yavin, was the approximate year in which scientists believed that the galaxy was formed from dust and gas. Star systems and planets would form in the following eons within the galaxy, and life and sentience eventually emerged on a portion of those worlds, leading to the events of the galactic history.

Text and facts from the “13,000,000,000 BBY” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.