Desktop Project Part 3: The massive massiveness of M54

[Over the past few weeks, I've collected a metric ton of cool pictures to post, but somehow have never gotten around to actually posting them. Sometimes I was too busy, sometimes too lazy, sometimes they just fell by the wayside... but I decided my computer's desktop was getting cluttered, and I'll never clean it up without some sort of incentive. I've therefore made a pact with myself to post one of the pictures with an abbreviated description every day until they're gone, thus cleaning up my desktop, showing you neat and/or beautiful pictures, and making me feel better about my work habits. Enjoy.] I post a lot of pictures of globular clusters, because they're just so darn pretty. They're roughly spherical collections of thousands of stars, all born at the same time, and bound together by their own gravity. But M54 is special, for more than one reason... but mostly ...