Celestia groaned and yawned, twisting about on the seats. Twilight looked perfectly comfortable, her back resting against the soft padding of the couch. Thanks to the latter pony's newly gained wings, the two had got a five star carriage on the train. The luxury, however, did not appear to stretch so far that the vehicle's speed was boosted.

"I hate Ponyville even more right now," Celestia scowled, pushing her new bushy mane out of the way. "Do they not have any respect for us Princesses?"

"It's better than Manehattan," Twilight replied, her lips tightening. "At least in Ponyville they let us on the train."

Celestia frowned at Twilight. "They didn't let you on a train in Manehattan?"

Twilight shook her head. "A taxi." She said shortly, before relapsing into silence.

"Oh," Celestia said. "I didn't know they were so rude. Especially to Princesses."

"You sound like you've never actually been there before." Twilight laughed without any humour.

Celestia stared at Twilight like she was crazy. "...I haven't."

Twilight stared back. "But you're the ruler of Equestria! I thought you'd have been all over the world!" She thought for a moment. "Why didn't you ever go?" She asked.

Celestia shook her head. "'Couldn't be bothered. I hate traveling by vehicle, did you know? I much rather prefer teleporting or flying. Even walking is better than getting on these things." She was beginning to wish she hadn't replied to Twilight's claim about Manehattan. The other Alicorn was staring at her in shock. It was annoying. And freaky. She couldn't get back to sleep and dream about cakes, now, because of Twilight.

Twilight groaned as some pony shook her shoulders. She lazily unfolded her wings and flapped them wildly to get whoever was trying to get her attention away. Her tactic seemed to work. Twilight heard a surprised "Ow!" and a thump which suggested the pony had fallen over. She winced as her tail pulled. He - or she - had accidentally snagged it whilst they fell.

She opened her eyes grumpily and saw a pink pony holding her nose with a pale hoof on the floor. "Pinkie?" Twilight clenched her teeth together. "Why on earth did you do that? And how did you get into my house?" She pulled herself up and feebly touched her now sprained rear legs. "You don't know, as usual," She said grumpily. "Only Celestia knows."

"Yeah, she knows." A pained voice - certainly not Pinkie's - said from somewhere below the Alicorn. "The train, uh, stopped and I tried to wake you up but you freaking slapped me in the nose." Pinkie (?) cringed as she gingerly removed her hoof from the nose. No massive damage was done and there wasn't a sign of any bleeding.

Twilight groggily opened her eyes and gasped as her memories flooded back to her. Her lavender cheeks were flushed a deep red. Oh great - she had just slapped a senior Alicorn on the nose. Twilight nearly slapped herself on the nose as well. Her life sucked. "Uhh, Princess? Are you okay?" Then she remembered something. "Oh, I mean - Celestia, are you okay?"

"Pretty much," Celestia said grumpily as she stood up and brushed herself off. "Why the heck did you do that?"

"We should get off before we land the train-driver into trouble," Twilight substituted evasively. "Plus, we need to get off quickly to -" Her voice trailed off. It had never occurred to her before. "Uh, Prin- Celestia? Can I ask you something?"

Celestia had her hoof on the door. She was excited for what was going to happen next. She got to send Luna to the moon again - who wouldn't get excited by that? But she was really annoyed at Twilight for slapping her in the face. It hurt. "What? Make it quick!"

"Why are we even going to Canterlot?"

Luna happily nommed on her sister's birthday cake. She now knew why Celestia loved cake so much. Seriously; she was going to ask her Mum for the exact same cake for her own birthday. Except it needed to be blue. The cake didn't look right when it was pink. She was rudely interrupted in her cake-ish fantasy by those annoying white and blue lightning rods. For like the one hundredth time that day.

"Again?" Luna asked, annoyed. "You've come in here, like, a million times!"

The guard looked at her strangely. "I beg your pardon, Your Highness -"

"I don't accept your pardon," Luna cut in.

"- but this is the second time today I came in."

"Enough!" Luna snapped, glaring at the guards. She didn't like smart ponies. "Why're you here?"

"Two ponies want to see you," The guard said, not responding to her hostile tone. "Princess Twilight Sparkle and some idi- hyperactive pink mare," He bowed his head. "Should I allow them to come in?"

Luna nodded. The guard left the room and two ponies automatically burst in. Well, one of them did. The other one looked like she didn't want to be there. That one was Twilight. Luna thought her gaze would light up when she saw her fellow Princess, but it only fell even further. "Hello, Princess," Twilight greeted her sadly, looking at Luna as if she were seeing her for the last time.

The pink pony stared at Luna with her mouth agape. "That - what - that's my cake!"

A cold feeling crept around Luna's heart. That voice was ever so familiar...

The pony glared at Luna and turned to Twilight. "Can you take off my disguise? I miss my horn!"

Twilight nodded and sighed, magenta sparks channeling visibly through her horn. There was a bright flash and Luna winced as the light cleared to show Princess Celestia standing in the place of the pink pony. She looked furious. Livid. Scary. Luna hastily shoved the cake behind her.

"Oh," Celestia said ominously. "You did not just eat my birthday cake."

"I do not know what you are talking about." Luna flinched away from her sister, eyes avoiding the purple ones opposite her.

"You imbec-"

Twilight cleared her throat and put a leg on Celestia's back. "Uh, Princess? Back on subject?" Celestia looked at the purple Alicorn and an understanding seemed to pass through them. Reluctantly, the Alicorn backed away. Luna threw a grateful nod at Twilight, who gave a strained smile back.

"I do not stop because I'm more worried about this subject I'm going to start." Celestia said hurriedly, seeing her sister raise an eyebrow.

"Indeed."

"I'm doing this because of Twilight."

"You are?" Twilight's brow creased, but she shut up when Celestia looked at her.

"Yeah. She wishes to spare you - for the moment - because...hmm...uh...she has feelings...for you?" Celestia supplied hopefully.

Twilight failed to pick up the unconvincing tone in her former mentor's voice. "What?!" She exploded. "I don't have any freaking feelings for he- mpph!" Celestia stuffed a hoof in Twilight's mouth, still with the shoes on and everything.

Luna rolled her eyes at her sister's play. Did she really think that her, Princess of Night, bringer of nightmares and dreams, could be so gullible. "So what did you want to talk about?"

"That," Celestia said coldly. "Is what I wanted to talk about."

After waiting ten minutes for Twilight to wash her mouth and Celestia to wash her hoof, the three Princesses finally in the astronomy room. Twilight left the others and started murmuring to herself as she ran her hoof over all the expensive equipment Luna used whilst stargazing. Celestia watched her under a disapproving gaze, whilst Luna seemed quite happy that some pony appreciated the beautiful night she brought forth.

Luna cleared her throat. "So, sister," She ventured. "You seem to believe that I want the sun to explode."

"To destroy Equestria." Celestia comfirmed.

"Why would-" Luna started, but then shook her head. "Right. Because you and Twilight seem to think that the sun is the biggest star in the universe."

"Well it is, isn't it?" Celestia deadpanned.

"Nope."

Celestia stomped her hoof angrily. "And how do you know?"

"Uh, because I'm the Princess of Stars?" Luna looked at her doubtfully. 'She's not very bright, is she?'

"Oh."

"Well actually, there are several other stars who are much bigger than the sun. And by bigger, I mean like twenty thousand times larger."

Twilight frowned. "But my research-"

Luna cut her off with a held up hoof. "These stars are farther apart from the Sun. The universe is massive, Twilight. Even I - bringer of night - don't have full control of all the stars alive." Twilight nodded, a little doubtful.

"So," She frowned. "What is the biggest star?"

"VY Canis Majoris," Luna replied automatically. "This massive red fat thing that's so big and heavy I can't move it."

Celestia, who had been listening to all of this, suddenly spoke up. "But the sun will explode anyway."

"Yes. I'm just saying that if I ever had wanted to blow up Equestria, I would have used a different star."

"But it will die."

"Yes," Luna looked at her sister with a raised eyebrow. "Every star dies, no matter how big they are and how long they take."

Celestia hesitated. "Will the moon die?"

Twilight pricked her ears, sensing a chance to impress the white Alicorn. "Nope. It could crash or collide with another planet in the future -"

"It won't," Luna interjected. "As long as I'm controlling it."

"Okay, it won't die at all. But if it did crash," She looked at Luna uncertainly. "It won't disappear entirely as particles of the moon should float around in space...if it's lucky, right?" Luna nodded and Twilight smiled.

"But the sun will die," Celestia pronounced the words slowly. "And the moon won't."

Luna and Twilight nodded in unison.

"...I hate you so much right now."

Author's Notes:

I hate science and I had to do a bit of research for this chapter. So now all of you scientists can relax and stop sprouting facts about the sun. xP

Man, I had so much fun writing this. If you find any errors - Scientific or grammatical - please tell me, because I hate editing. I hate everything don't I

NOTE: Woah, woah, guys. After spending a few minutes reading through these comments, I've found a lot of scientific stuff. I'm the crappiest scientist ever and I know that you guys are just having fun (although I don't really get how you have fun by making scientific points, since whenever I do that, my points don't even make sense xDD) but this is an AU and a fiction story, so...relax, 'k?