Due to a programming error, the terraforming probe that landed on Meridian Seven ingested all of the wrong compounds and tried to stitch together a suitable habitat for the incoming colony ships. By the time the colonist arrived and were revived from hibernation,, Meridian seven was a bubbling, putrid mass of tentacles and fangs floating in boiling oceans of acid. The colonist went back into hibernation after sending a message. Wake us up when you fix this crap. The colonization ministry sent another ship out and 100 years later it vaporized the sleeping colony ship and the Meridian seven disaster.