Planemo Adventure.zip is a release file of the Minecraft map Planemo: A Space Adventure Map, made for Minecraft 1.9-Snapshot. It was published on February 25, 2016 and is 146 MB in size. For the full description, screenshots and every other version, visit the Planemo: A Space Adventure Map map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.