Dear Earthling,
Did you know the grass is always greener on the other star systems? Just a tad more photonic, if you get my drift.
P.S. I finally met a black hole's gravitational pull, and it's quite the conversationalist.

Martian Memos: Earth is round, but we like our roads; they curve towards unknown dimensions.
P.P.S. If you see an Earth cat, tell it I'm still pondering the meaning of existence and boxes.

Hey there, lunar landers! I just wanted to say that space dining really needs a Michelin star.
A piece of comet cheese, perhaps? Don't let gravity hold your taste buds down.
Until next orbit, Luna Lee.