Disclaimer: I wish I owned this. I want it SO BAD.

A/n: Hey guys! What's up? Have I ever told you guys about my insomnia? It sucks. This morning, I woke up at 4 freaking AM and could not get back to sleep. Bummer!

Anyway, this (and more possible little fluffy shorts) are ALL ADAM YOUNG'S FAULT. That's right, kiddies, Owl City came out with a new album (All Things Bright and Beautiful) and I've been listening to it NON-STOP. I've heard Galaxies so many times I think I might throw up. (JK, that's too awesome of a song to make me throw up.) I would suggest listening to that while reading.

Thor sighed softly, pulling his arms behind his head. The young prince was lying down, staring blissfully up at the night sky through the glass ceiling of the astronomy tower. The tower was located on the west side of the palace so that it overlooked the Bifrost. The rainbow bridge cast an eerie glow over the tower at night, making the black marble look smooth and creamy rather than rock hard and cold.

The blonde was completely ignoring Loki, who was chattering on next to him.

"...And I think that might be Kochab...Unless it's Polaris...," muttered Loki, biting his lip as he looked rapidly between the ceiling and a half- completed star map which was spread out on the floor in front of him. He could never tell which was which—they were all just stars, why did anyone have to know their names?

Loki didn't even know why he was here. Apparently, he was too young to learn about the nine realms, but Thor had just started his studies. And because Thor was Thor, he often got lost and came to Loki for help.

Now, Loki normally could handle Thor's questions; it was almost to the point where it was Loki who was doing the blonde's work for him. (Loki, of course, never breathed a word of this to Thor's teachers. Why, he didn't know. Perhaps it had something to with the fact that Loki actually wanted Thor to learn so that he would stop asking him questions.)

But when it came to a astronomy assignment, Loki had no idea what he was doing. Like always, Thor had shoved the scroll upon his little brother, but Loki had protested. As a result, both boys had snuck out of their rooms and slunk over into the astronomy tower. Loki had previously never been in said tower, and made a silent promise to himself that he would never step forth in it again. It was too confusing.

Loki glanced at his brother and scowled.

"Thor, are you even listening to me?"

"No," the blonde answered, not missing a beat, "and you're wrong, by the way. That's Vega and Etamin, not Kochab and Polaris." Loki stared blankly at him. Thor raised an eyebrow. "What?"

"If you know this, why am I the one who is writing it down?" cried Loki.

"Because you have better handwriting," replied Thor smoothly, turning his attention back onto the stars.

Loki clapped his hand to his forehead and dragged it down the length of his face. "You're such a prat," he grumbled.

"What was that?" said Thor loudly.

"Nothing, brother," said Loki quickly, looking up once more.

"Really?" asked Thor slowly, propping himself up on his elbows and narrowing his eyes at his brother. "Because I thought you said something."

"Nope."

"Are you sure?"

"I'm positive," said Loki, writing something down on the star map.

"Only fools are positive," Thor pointed out.

"Are you sure?" questioned Loki, looking at him and arching an eyebrow.

"I'm positive," said Thor firmly. A grin broke out on Loki's face, and Thor's brow furrowed. "...Wait..."

Loki burst out laughing. Thor sat up and glared at him. He waited until Loki had quieted down, then asked,

"You finished?"

"Yes."

"Good."

Then, without warning, Thor tackled Loki and began to tickle him mercilessly. Loki squirmed and shrieked and tried to protest, but soon they were both laughing. When the both couldn't breathe, they collapsed onto the hard marble floor, too winded to speak.

"I...I...hate you...," gasped Loki, but he was grinning when he said it. He focused back on the stars above them. He pointed to one of them. "Phad?" he guessed.

Thor shook his head. "Merak."

Loki shut his eyes and groaned. "I do not get how you can tell them apart!"

"It isn't that hard," said Thor.

"For me it is!" replied Loki.

"I never would have guessed that you would have found astronomy difficult," teased Thor.

"Shut up; I can get everything else just fine."

"Exactly my point."

"Everyone has their Achilles Heel," said Loki. He snagged his bottom lip between his teeth and nodded to a consolation. "Is that it?"

"No," said Thor, grinning, "not even close."

"Darn it!"

They stayed up in the tower all night. The next morning, when Frigga was on the brink of a panic attack, she found them there, curled up into each other on the cold marble floor.

The queen smiled softly, shook her head, and let them be. She didn't have the heart to wake them.

A/n: Because all fights should end with tickling.

...I've had too much fun with this. I'm sorry if you are all burying your faces and saying, "Oooh, Batty, why?" But I don't care. Anyway, I see Thor being really good at astronomy because of that little scene in the movie where he was explaining Yggdrasil to Jane. (You get bonus points it you tell me how to pronounce that.) And, of course, if Thor's good at something, Loki has to be bad at it.

Oh God, lack of sleep has made me chatty, hasn't it? Wow. Oh wow. Ok, I'll shut up. Review please, and have a nice weekend!