Astronomy Picture of the Day . ... 30.01.2010 . ... Credit Copyright: B. E. Schaefer ( LSU ) Explanation: The ancient text has no known title, no known author, and is written in no known language: what does it say and why does it have many astronomy illustrations? The mysterious book was once bought by an emperor , forgotten on a library shelf, sold for thousands of dollars, and later donated to Yale . ... digg_url = 'http://apod.nasa.gov/apod/ap100131.html'; digg_skin = 'compact'; . ...