(Newser) – NASA released its 2012 version of the "Blue Marble" image of earth from space last month, and it went viral in a hurry. What to do for an encore? Show the other side. The first image focused on the western hemisphere. Citing huge demand, NASA this week released a companion image that focuses on the eastern hemisphere. It's a composite image, and Wired has the particulars of how this new shot came to be.