Luna gazed up at the subtly luminescent sky above, her masterpiece, her work for all to see. Billions of pinpricks of light shining down upon the world, and the moon it's crown jewel. Such arrays were pictures only the clever could make map, only the young could imagine. Them and her, that is. She knew every pattern, every shape, every constellation. So it wasn't hard for her to notice four new lights, each shining bright orange, and blazing a path across her otherwise flawless work of art. All of which were growing alarmingly close to the ground. Three seemed to be drifting off into the distance, while one seemed to be coming straight-
"AAAAAUG-!"
Luna ducked as the screaming ball of fire burst through her ceiling and smashed itself into a wall.
CRASH
Behind her, embedded into the stone wall, was a metal sphere, surrounded by a black corona from the fireball it had been consumed in. It may have been white, but it was covered in scorch marks from the blaze it was still consumed in. The center piece was rapidly spinning around like a pony's eye in a panic. Oh, and it was still yelling.
"SILENCE!" Luna used her Royal Canterlot Voice.
"I'M ON BLOODY FIRE!" It shouted in a metallic voice.
Luna quickly extinguished the fire with a strong flap of her powerful Alicorn wings.
"Oh, ooh, that's much better, thank you, uh- I can't see. Nothing. That's not good." It said, the center apparatus moving more slowly and controlled now. "I think my eye is covered by the ash. Or soot. One of those things. Do you think you could, uh, clean it off so I can get a good look at you?"
"Perhaps. What are you?"
"Oh, well, now there's a story for you. I'm a core designed to, well, moderate the central core of a facility billions of miles away from here-"
"A core?"
"A robot?"
Luna was silent.
"Are you- you still there? I still can't see anything. Blind as a bat."
"Yes. Where is your eye?"
"The big circle in the center, With the plates that slide over it." Luna located the specified area, and cleaned it off with a levitated rag. The 'robot' blinked it's eye. "Aw, that's brilliant. Thanks for- Where'd you go?"
"I'm right here." said the alicorn, puzzled.
"What? You're a horse?"
"I'm an alicorn."
"A what?"
"A cross between a unicorn and a pegasus."
"But those aren't real, they're fairy tales. Myths."
"We've never even heard of your kind here. You are, I suppose, a myth to us."
"Huh. I did not think of it that way. What's your name?"
"I am Princess Luna, co-ruler of Equestria."
"Ruler? Aw, that's brilliant! I was hoping to find some way to come in contact with the upper management of this place. My name's Wheatley, by the way. If you were wondering."
"It is a pleasure to meet you, Wheately. Even if you did tear a hole in my roof."
"Oh, that's right, I did that. Sorry. I didn't really have much control of where I was going. No arms, or legs. Anything, really."
"'Tis fine. It will be repaired. Come, my sister should meet you as well."
"Oh, that reminds me, I had these companions of mine, they would've come down too. Did you happen to see where they went?"
"Those three other comets? They went far into the distance. We could send for them?"
"That'd be great."
"Come. Let us go meet my sister." Luna walked out of the room.
Wheatley cleared his throat. Metaphysically speaking.
"My apologies." She levitated him out of the wall, and out of the room. Moments later, the wall collapsed.