A contribution by Nell29
The horizon they watch is black space over black rock. The superthin neon-argon atmosphere, created by sunlight smashing rock, holds only the faintest predawn glow. But the sunwalkers know the time, so they wait and watch—until—
a flick of orange fire dolphins over the horizon and their
blood leaps inside them. More brief banners follow, flicking up, arcing in loops, breaking off and floating free in the sky.
— 2312, Kim Stanley Robinson