January 5, 2012
I sprouted, thrust into this world without anyone consulting me. I am not one of the beautiful; I am not one that by any other name instills flutters in the human heart. I am the kind that makes little boys gag at the dinner table thus being sent to bed without their dessert. I am utilitarian, hearty vegetative matter that can thrive under harsh conditions. I am zucchini – and I am in space.
I became aware of my fellow crewmates for the first time. It takes a sprout a few days before grasping your surroundings. One is my gardener who waters my roots every day. I overheard that we are in a spacecraft orbiting Earth and are part of a long space mission. As crew, I am not sure of my role but am ready to contribute what I can.
I discovered that my roots are bound in a ziplock bag. This bag has a canoe shaped piece of closed cellular foam wedged in the opening that retains the needed moisture. My stem is held in place by a piece of scrap spongy material called pigmat. Used for absorbent packing for spacecraft supplies, pigmat will soak up spillage from liquid containers. It makes a nice transition between the stuffy closed cell foam and my green parts and will keep nasty mold away from my stem.
This is most definitely not hydroponics; my roots are not submerged in a bag of water. This bag is mostly filled with air and only has a small amount of water neatly tucked in the corners from the action of capillary forces in weightlessness. This is aeroponics, a rather new method for raising plants without soil and without large volumes of water. Only a small amount is needed, just enough to keep my roots at 100 percent humidity and make up for what I drink. My roots are not hermetically sealed in this bag, they have access to gas exchange with the cabin air. My roots are thus exposed in this transparent bag, naked to the universe. Embarrassed, it took me a few days to get over the idea that anyone can see my roots without any dirt covering them.
Les 73 pages du blog que l’astronaute Don Pettit a tenu lors de son séjour dans l’ISS sont intéressantes à lire.