We’re looking for costumes which are in any way related to outer space. It could be as obvious as Star Trek, or as far-fetched as Bugs Bunny. (Though the more tenuous links better come with explanations!)
Expect food, games, and spacey decorations, but bring what you want to drink.
London Sector, Sol-3 (Earth), Milky Way Galaxy
Sol-3 Orbital Period 2401.301