I wrote a filk for "The Maretian"

So sit right back
And you'll hear a tale
A tale of a fateful trip
That started from this rocket port
Aboard this pony ship

The Skip was a mighty missile mare
The medic brave and sure
Five astronauts were launched that day
On an inter-system tour
An inter-system tour

They encountered a tiny speck of rock
From their universe they were tossed
If not for the courage of the fearless crew
Amacitas would be lost
Amacitas would be lost

The ship's marooned on the surface of
The fourth planet of our sun
With Dragonfly,
the skipper too
The medic who loved to fly
The mighty mage
The dragon and the human man
Here in Watney's canvas dome

So this is the tale of our castaways
They're here for a long, long time
They'll try to all survive on Mars
It's an uphill climb

In the cave farm and the canvas hab
They grow life's necessities
Mars tries to kill them every day
Inhospitable as can be

The human and the Skipper too
Will do their very best
To keep them all alive and well
In their cold hard Martian nest

So join us here each night my friends
You're sure to get a smile
From all six stranded astronauts
Surviving Martian style