UFO

UFO (Unknown Flying Object) is the alien space ship. The UFO is bigger on the inside than outside.

History
American military has captured the UFO and the aliens in it. It is stored and researched in Area 51 in Nevada by the Majestic 12. They try to power the UFO with the Element 115 which is also not of this earth, being an artifact fashioned from a meteorite by People of Kuma Kuma.