Little Alchemy Cheat Sheet
(beta)
space
space
Combined from:
sky sky   +   star star
sun sun   +   star star
moon moon   +   star star
Combines with:
earth earth   +   space space   =   planet planet
airplane airplane   +   space space   =   rocket rocket
stone stone   +   space space   =   meteoroid meteoroid
life life   +   space space   =   alien alien
house house   +   space space   =   space station space station