The star system Omega Centauri was just another oddity on a map to scientists in the not too distant future. However when they found the star was orbiting an earth-sized, earth-like planet instead of a black hole as its motion had suggested, a mission was scrambled to investigate this most unusual of celestial behaviors.

Hamstrung by politics, and nearly crippled before it began, the 'Lone Ranger' mission was reduced to just one crew member and left to his own devices.

These are the logs of Arrow 18 and its lone commander. This information is classified TOP SECRET by the Global Space Agency.

Do NOT tell the princess.

Rainbow has worked hard to become an astronaut, and is shocked to learn that her friends have turned her first trip to space into a mere publicity stunt. When things go wrong, she must put her objections aside if any of them hope to make it home alive.

Just because you don't have wings doesn't mean you can't soar. You give Rainbow Dash a rundown of humanity's history with flight.

A 2nd person oneshot with you as Anonymous.

35,000 years ago humanity ruled the sol system. But a violent war broke out taring humanity apart and bringing humans to extinction. Years later new life formed and the remains of human civilization was mostly lost to time. most of it.

Characters will be added as the story goes on.

After having her first relationship end on a sour note, a dejected and emotionally confused Twilight returns to Ponyville. Rainbow Dash soon realizes something is wrong and comforts Twilight. Helping deal with Twilight's problems, Rainbow becomes a shoulder to cry on, a Guardian Angel of sorts. As Twilight recovers, the two mares find themselves learning more about themselves and each other.

A TwiDash "song-fic" with an interesting take on Rainbow Dash.

Inspired by various songs, including some really amazing community creations.

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

Everypony knows Twilight is a mare of immense intelligence, always eager to complete the Princess's academic assignments and learn more about any subject. Thus, when Twilight discovers a strange magical book in the library basement that provides her with unlimited information in just mere seconds, it's only natural for the studious Unicorn to... grow attached to the book, right? And what will Princess Celestia think of her new "method" of studying?

Twilight Sparkle decides to try a special herb the Cake's procured from Zecora, originally used to make Pinkie Pie less... hyper.

Done purely for comedy!

When the Elements of Harmony defeated Discord, they did their job too well, and completely undid all of the things Discord directly did...

... Like send a subcontinent from earth into a pocket dimension so he could focus properly on his toys. And now Equestria has appeared on Earth.

Yet, neither side was completely ignorant of the other. On Earth, there was the show "My Little Pony: Friendship is Magic" and in Equestria there was the ever popular movie serial "The Dark World: Technology is Courage" which was a favorite of colts everywhere as well as the "Pumans".

And now both sides learn through an event that the other is real. Come join us as we watch as both sides learn to work and live together. And as they find out that events on their respective fiction was not as nice as it seemed as we widen the lenses of the view points...

A Round Robin created on SpaceBattles of which I am a participant and am posting with all their permission.

Celestia is tired of waking up before sunrise. She decides to go on a short vacation but needs to find somepony to stand in for her...