Google has many Easter eggs hidden in its code. For example, you can search "do a barrel roll" to see a visual effect, "once in a blue moon" to see a precise calculation, and the "answer to life the universe and everything" to see what you get when you multiply six by nine.
To celebrate the release of Star Wars: The Force Awakens, Google made another Easter egg for Star Wars fans. If you Google "a long time ago in a galaxy far far away," you'll see the search results displayed to look like the text crawl in the original trilogy.
-via Nerd Approved
UPDATE 11/25/15: It only works in Chrome and Safari. Thanks for the pointer, Miss C.