Mimsphere

 was the home planet of the Mim. (AUDIO: Shadow of the Past) Hass and Joseph ventured to the Mimsphere on a diplomatic mission, as well as to perform an environmental survey. The planet was home to many unique plant species that were collected by Hass and protected under his watch after the planet was destroyed.

It was destroyed after Hass released built up radiation from his suit. (AUDIO: Freedom of Information)