A Giant Squid in the Flying Bat . ... Credit Copyright: Steve Cannistra ( StarryWonders ) Explanation: Very faint but also very large on planet Earth's sky, a giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this scene toward the royal constellation Cepheus. ... If so, the truly giant Squid Nebula would physically be nearly 50 light-years across. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...