Hearth Interactive

Greenhouses in Orbit

Written
Written January–April 1917; printed in part in Priroda i liudi, 1918, and in full at Kaluga, 1920
Place
Kaluga
Language
Russian
Kind of source
literature
Reading time
13 minutes
Difficulty
Moderate
Intensity
Low

Imagining space travelSpace stations

Versions

The edited translation, in simplified modern English. Bracketed words were added for clarity; [...] marks a cut. Tap a note number to read the note. Point at or tap a phrase to see the original behind it. Phrase links checked in a separate review.

Chapter 21. The Rocket Turns into a Flowering Garden

“Well, gentlemen, we have had enough of fooling around and being fussy,” Newton1 told the meeting. “Let us get down to business while our supplies are still far from running out.”

“You see,” he went on, “there are many windows along one side of the rocket. If we open all the shutters, we get an area of glass 80 meters long and 4 meters wide, one-third of the way around the rocket. For now we do not need so much sunlight. In fact it would be unbearable: too hot, and so bright it would tire our eyes. But this mass of light covers 320 square meters, or 16 square meters per person.2 With the help of special plants, it can give us plenty of oxygen. It can also give us food, in the form of fruit that contains starch, sugar, oils, and nitrogen-rich and fragrant substances.”

“Even if our food supply does not stay untouched, at least we will use it up several times more slowly,” added Ivanov.

What the lungs, skin, kidneys, and so on gave off was taken up in special containers, and it made excellent food for plants. Seeds were planted in boxes of soil fertilized with this waste. When the seeds sprouted, the boxes were set out in the light, and the shutters were opened wider and wider. The sunlight here was extraordinarily strong, for no thick layer of Earth’s air weakened it. It shone without a break, and its rays fell straight on the plants. There were no pests, and the moisture and air were just right. All this worked wonders. In less than a month the little plants were hung all over with juicy, nourishing, fragrant fruit. They flowered richly and were pollinated by hand. Since nothing had weight, the twigs spread freely, and the fruit did not weigh them down or bend them. When the leaves grew thick and almost covered the windows, the panes of glass could be taken out, leaving only a layer of quartz. Then the plants grew twice as fast in the abundant ultraviolet, or “chemical,” rays.3 Still, the fruit was not quite enough to live on, and the stored oxygen still had to be used, little by little, for breathing. But things went so well that they decided to build a greenhouse outside the rocket in time. Then they would be fully supplied and need no stores at all. They would stand on their own feet, so to speak.

Chapter 31. The Greenhouse

A new meeting opened with a speech by Newton on how things stood.

“Now, gentlemen,” he began, “I ask you to turn to our everyday affairs. Our stores are getting smaller and smaller. They are turning into fertilizer for the plants, but not enough fruit and vegetables are growing to use all of it. The rocket is too small for that. We must build a greenhouse onto it, onto the rocket. Then we will have even more room to stroll without putting on space suits. Then we will no longer have to spend our stores of oxygen and food: the extra plants will give us both. All our waste and refuse will be taken up completely, too. We will take from the plants just as much as we give them. We will not need to save our stores either. We will say goodbye to them and live on the carbon and nitrogen compounds in the fruit. With our easy life, with no hard labor, and at a temperature of thirty degrees,4 that will even be healthy and necessary.”

“Wouldn’t it be better to build these greenhouses apart from the rocket?” said Laplace. “Plants do not need as much gas, or as much pressure, as we people do. Plants also need an air of their own, with extra carbon dioxide, moisture, and so on. None of that suits people. The greenhouses need be no bigger than a tube 2 meters across, just wide enough for a gardener to fly through freely to pick the fruit and tend the plants. That, and the thin gas around the plants, will save a great deal of building material. Our supply of it is not unlimited.”

“Quite right,” Newton agreed. “I believe we already have greenhouse parts almost ready, built for exactly that plan. As for room, there is plenty in the rocket. And if it is not enough, nothing stops us from strolling in space suits for hundreds of versts5 around. The rocket itself, with its explosion tubes6 and its huge store of explosives, can leave Earth and travel wherever we like: to the Moon, if we like, or to the asteroids. Even now it is out for a stroll, showing us views of Earth, each more beautiful than the last. So we are traveling all the time anyway. We will connect the greenhouse to our rocket with two thin pipes. One will carry the carbon dioxide and other human waste that builds up in the rocket out to the greenhouse. The other will bring fresh oxygen and ozone7 made by the plants into the rocket. We cannot do this without pumps. But we have solar engines here, brought from Earth, and they work beautifully.”

“Caring for the plants here is wonderfully easy,” said Franklin. “The soil has been baked to kill weeds, harmful bacteria, and parasites. We add the useful bacteria ourselves, for example those for peas and beans.8 So there is no weeding or pulling up of useless plants. But we must make sure that the soil, the moisture, and the gases are mixed just right.”

The liquid or soil for the plants is mixed just before planting, and pumps keep it moist automatically. They draw in water and send it on. The water collects by itself, as water vapor condenses in special parts of the rocket, the coldest ones. The flowers are pollinated almost instantly with a blower. People’s breathing makes the plants’ air. And the fruit, free of any blemish, spreads freely in all directions without straining the stems, for there is no weight.

“Won’t we have to fly outside for these separate buildings?” asked one of the craftsmen.

“Certainly,” said Newton. “Don’t you like that?”

“Just the opposite! I very much want to go for a walk outside the rocket. I haven’t been out there yet,” the same voice replied.

“We will be out there while we build it,” said Ivanov. “And we will often have to visit the new greenhouse in space suits, to pick the fruit and tend the plants. The gas pressure inside will not be high enough, and the air will not be fit for people to breathe.”

Chapter 32. Building the Greenhouse. Supplies for Life That Never Run Out

A few hours later they began building the greenhouse. They unpacked the spare parts. Most were thin curved plates of a special strong, springy glass with a square wire mesh melted into it. There were round parts too, metal fittings ready to use, and very thin sheets of plain metal. All the materials were pushed a few at a time into a special chamber. The air was pumped out of it, and then the hatch to the outside was opened and the materials were pushed out into the ether.9 The large pieces were simply tied to the rocket. The smaller ones were put in a round wire cage that had been pushed out of the rocket beforehand. In there the materials roamed from corner to corner like caged animals and took a long time to settle down. The cage, of course, was tied to the rocket and had an opening that could be closed. The pieces had been numbered in advance, and in a few hours ten craftsmen, who had climbed out of the rocket as described before, fitted them together. At first they seemed frozen stiff and moved awkwardly. But they soon pulled themselves together and set to work, glancing around and under their feet, where the abyss yawned, in a comically nervous way. The work was very easy. However massive a part was, it took no effort at all to move it. Pieces that were barely joined did not come apart, fall, sag, or bend under their weight, however huge, thin, and flimsy they were. The foreman gave the orders. Springy threads stretched between the men’s space suits let them talk to one another perfectly well, in the most ordinary way. They could even all talk at once, though that, as always, turned into a muddle. The vibration began in a man’s throat. The air in his helmet passed it to his suit, the suit passed it to the thread, and the thread carried it, in spite of the emptiness all around, to the other suit.10

[...] Soon they finished the welding. They tested whether it was airtight and welded shut the cracks and holes they found. They tested again and worked some more, and at last they were sure the greenhouse shell let no vapor or gas through. The result was a tube 500 meters long and 2 meters across. A huge window ran its whole length and reached a third of the way around it. If you pictured the tube lying flat, the window would be 500 meters wide and about 2 meters high. For all its size, the tube was not very heavy. It was strong and flexible and hard to damage. Even if someone managed, with great effort, to break the glass, no gas would leak out. The strong metal mesh melted into it kept the glass from falling to pieces, and the hairline cracks could hardly let any gas escape. When struck, the wall only gave a little and quivered like a spring. Near the finished shell the craftsmen in their space suits bustled about and darted back and forth. They bumped into one another and sometimes went spinning comically, but they gravely stopped themselves and admired their work from every side and from near and far.

It remained to put a container of semiliquid soil into the greenhouse, let in the thin gases, and plant the seeds. Regulators also had to be fitted for the temperature, the moisture, the fertilizer, and the mix of gases. [...]

You may be amazed that such a huge thing as the greenhouse could come out of the rocket. But, first, its volume was about the same as the rocket’s. Second, the pressure of the gases and vapors inside it was so slight that its walls could be very thin, no thicker than ordinary cheap glass. So the whole shell weighed about 20 tons, while the rocket with everything in it weighed 400 tons. The greenhouse added another 1,000 square meters of surface, lit by sunlight falling straight on it for two-thirds of each day out here.11 That came to a whole 50 square meters per person. It is hard to picture what a huge amount of the most nourishing fruit this surface could yield here, under such wonderful conditions for growth and light! The panes were of pure quartz, so they let the chemical rays through very well, and this helped the harvest greatly.

[...] Garden strawberries, wild strawberries, and all kinds of vegetables and fruit grew not by the day but by the hour. Many plants bore a crop every ten or fifteen days. Dwarf apple trees, pears, and other small fruit bushes and trees were planted. These bloomed without a break and bore wonderfully large, tasty fruit. Some trees were coming into flower while others already had ripe berries. Watermelons, melons, pineapples, cherries, and plums did especially well. But the spreading bushes and little trees had to be pruned all the time. Fruit of every kind was picked constantly, at any time, for there were no seasons. There was one single climate that never stopped or changed. It could be changed only by hand, though over a very wide range. That is why plants from every country could be grown. Large trees were not yet possible, because the greenhouse was small and there was not enough soil and fertilizer. When millions of living, thinking beings have settled these empty spaces of the ether, things will be different...

People often visited the greenhouse, both to pick fruit and to take a stroll. It could not be done without space suits. The pressure of the gases and water vapor in the greenhouse was no more than 20 millimeters of mercury.12 That is forty times less than the pressure of Earth’s air, and not enough for a person. The mix of gases, too, was excellent for plants but quite unsuitable for people. The water vapor was far from saturating the air at that temperature. Before that could happen, the moisture given off by the leaves and soil condensed in special side chambers of the greenhouse. These were always in shade, so they stayed close to freezing. As a result the vapor pressure was only 4 to 10 millimeters. Carbon dioxide, oxygen, nitrogen, and the other gases were all very thin as well. But this, as is known, makes little difference to how well plants grow. [...]

Visiting the greenhouses was a huge pleasure, especially at first. The plants filled the whole space so thickly that one could hardly fly among all this wonderful greenery and fruit. As they moved, people kept their bodies lined up along the tube so as not to brush against the fruit. But they brushed against it all the same, and ripe fruit popped off its stalks in great numbers. It never fell off by itself, however ripe it was, for it had no weight. And the fruit that did pop off the stems did not fall anywhere either. It drifted back and forth, along the tube and across it, until it got caught in the thick leaves. Flying like birds, our strollers could have fed themselves just by opening their mouths. Unfortunately, their space suits got in the way. The fruit and berries only bumped against the glass of their helmets and bounced right off. They had to be caught with nets, like butterflies, and put into light, semitransparent bags.

Getting into the greenhouse was not simple, even in space suits. First a person had to fly in from the ether to a special chamber beside the greenhouse, a kind of entrance hall with no gas in it. Then the outer door, to the ether, was shut. The inner door was opened, and air from the greenhouse was let into the chamber. Through that door the person flew on into the greenhouse.

Things became simpler when the greenhouse and the rocket were joined by a single passage chamber. A person in a space suit first entered the connecting chamber, which held the rocket’s air. Then that air was pumped back into the living part of the rocket, the next door was opened, and the person entered the greenhouse. If he then wanted to go out of the greenhouse into space, he moved into a special greenhouse chamber with two doors. All the gases and vapors were pumped out of it into the greenhouse. At last the door to space opened, and he flew out to freedom.

Notes

  1. Most of Tsiolkovsky’s travelers bear the names of famous scientists: the Englishman Newton, the Frenchman Laplace, the American Franklin. Ivanov, a Russian, is the story’s own inventor of the rocket. back
  2. Twenty people are aboard: the four scientists and sixteen craftsmen. back
  3. Ultraviolet light was discovered in 1801 through its chemical action on silver salts; Tsiolkovsky also calls it “chemical rays.” In the story, quartz lets it through better than glass. back
  4. Thirty degrees Celsius, about 86°F, the warmth the travelers keep in the rocket. back
  5. An old Russian measure of distance, about 1.07 kilometers (two-thirds of a mile). back
  6. The tubes in which the rocket’s fuel explodes. In the story it is driven by two liquids, discovered by Franklin, that explode little by little as they mix. back
  7. A form of oxygen. Around 1900 many people believed it made the air of forests, mountains, and seashores fresh and healthy, and that plants gave it off. back
  8. Bacteria that live in swellings on the roots of peas, beans, and their relatives and turn nitrogen from the air into plant food. back
  9. Physicists of the nineteenth century held that all space was filled with the ether, an invisible, weightless medium that carried light. Here “the ether” means outer space. back
  10. Sound cannot cross empty space, so in the story the space suits are linked by taut threads that carry the vibrations of speech. back
  11. The rocket circles Earth in about 100 minutes. Earlier in the chapter the sun sets 67 minutes after it rises, and night lasts 33 minutes. back
  12. Pressure measured by the height of a column of mercury it can hold up. back