300 long years ago with the help of Twilight Sparkles Princeses Celestia discovered a way to find far off planets, one not of interest was AU.31 300 years later a group of About 50 ponies on The Lunar Glider there trusty ship were sent to explor a planet in hopes of it being possibly colonize-able. But instead they found some thing worthy of Ponie Command sending all military ships in the 3 light year vicinity to them.
(P.S. Something's mentioned in the description are not in the story yet.)