The ectopic rhythm of the heartbeats pounding through my chest can be heard all the way from earth.
Not sure that ectopic is the right word here. Ectopic makes me think of either abnormal/out of place, or ectopic pregnancy. I think the connotations of ectopic are too removed from what you are trying to achieve. So consider rephrasing that.Preparing myself, I move cautiously towards the rack by the door. I pull down the helmet at the top, feeling the rough material strewn across the neckline with my fingers.
I'm not sure that strewn is the best word for the job. Strewn usually means scattered,even messily. I think this is a bit too streamlined to be "strewn."Placing the helmet over my head was always slightly claustrophobic, as if I was choosing to limit my life force to a pipe filled with a finite amount of oxygen on my back. I twist the helmet side to side, looking for the
click which told me it was fastened. fastening click. < I think this sounds a bit more precise in language. A moment of suffocation follows, before a gush of air fills the sphere around my eyes. I choke for a second, unaccustomed to the large quantity of air, before calming myself with deep breaths.
Initiating the anxious process, I pull the main lever and begin to input the codes; red, blue, green. I reach for each button in turn, missing at first, before steadying my hand and continuing. Finally, I place my shaking fingers on the tactically tightened latch, and cautiously start to turn it. A nerve-wracking creak betrays a small sigh of oxygen breaching the seal between mankind and outer space.
Think about when you are setting this story. If you are setting it in the 1950s, mankind is appropriate. If you are setting it now, humankind is most appropriate. Unless, you are specifically playing on the "one small step for..." quote 
Tightly shutting my eyes, I anticipate the worst outcome. I gasp for air, not having realised that I was holding my breath. Leaning onto an uncovered button, the ship releases a mechanical noise as numerous steel steps dispense in front of me like a flower’s blossoming petals.
Great imagery!Slowly.
Purposefully.
My languid legs lead the original pathway. I am the first person.
Fearful to experience the untouched surface we have landed on.
The rough terrain meets my weary eyes. Ancient, dirt covered gorges, deep enough to avoid exploration, edges steep as Mount Everest, radiate a vibrant colour matching the neighbouring sun. Lining their banks, oceans of sharp jagged edged rocks tell stories of elongated years of endurance on this planet of isolation through their layers of sediment. They glisten with the orange gas that marks the earth of this planet - beautiful obstacles for my time-limited mission.
As I walk, the white Kevlar fabric encasing my swollen feet sprinkles with the flame coloured soil, irreversibly staining them. The craggy highland towers on the horizon, swimming in the white blanket of fog that covers the rest of the planet. Its peaks are jagged towards the top, covered with obtuse shapes that glisten in the sunless light. Below, steep, dusty slopes cascade towards the serrated earth.
The sly mist hugs my ankles with every stride I take towards it. It wraps me in its cold embrace, sweeping me along to the edge of the planet where I could fall off and swim among the stars.
In the peripheral of my eye, I see it. The ingeniously built piece of metal rolls towards me using the thinly sliced rubber circles attached gently to the metallic undergarments of the machine. Its head composed of a high definition camera along with the extended clamps secured to its front giving it a stereotypically childish appearance.
“The rob…rob…robot”
The anxious voice coming from my protective apparel interrupts my prolonged gaze and reminds me of my mission: delivering the vehicle to the mountains with their opaque flag of mist.
My feet suddenly feel the toughness of the minerals covering the ground. I look down and am met with an explanation. I have arrived. My field of vision is too minuscule to absorb the enormous alp standing in front of me and yet I push forward.
I trek with measured steps, up the slope. Left. Right. Left. Right. The steady rocks perfectly aligned for my grip over the crumbling dirt.
Looking down behind me, the distant fog still blocks the view, yet the ground is visible. My exhaustion is clinging to my back. The endless training I endured feels non-beneficial as my contracted muscles threaten to tear my cracked skin with every small step I take.
I take my dilated eyes off the treacherous ground and look up to see the cloudy obstruction to my sight vanishing. My feet begin to fumble, and suddenly, a close-up view of the crusty floor meets my eyes. I stay down - a chance to examine the foreign land. My pupils turn slowly, careful to not miss a speck of treasure.
A rusty circular object flashes in the peripheral of my vision.
Moving closer, its dented edges and scratch-filled skin become visible. The black, rippled plastic coats majority of the device, with silver buttons joined to the top, and specks of aged, glimmering gold within the edges. As if a fossil, the ground sheathes it, outlining the letters “f.l.a.s.h.” on one of the main buttons and “on/off” on the other. I turn my head slightly to see on the side in big, slanted font: “Nikon 1935”.
Its decayed state doesn’t stop my reflection from appearing in the blemished, glass-plated mirror attached to the outer front of the contraption, indicating my confused expression.
What seems to be a golden-plated emblem on the right hand corner shines, as if brand new, with four letters engraved on it: MARS.