It’s generally accepted that planetary colonies will have to grow their own food, and no colony illustration is complete without an astronaut tending to some crops. But like everything in space, this is not as easy as it looks.
Various plants have been grown on the International Space Station, but the problem for planetary greenhouses is not the lack of gravity, but the lack of pressure. In the initial stages of colonisation, most materials and equipment will have to be brought from Earth, and if you can grow plants at a lower atmospheric pressure, it will save a lot of mass.
Air may need to be transported from Earth, and even if there are convenient deposits of ice to split oxygen from, you still need nitrogen and carbon dioxide to make plant-friendly air, which add mass. Greenhouses on the Moon and Mars would need to operate under little or no atmospheric pressure. Until colonies can make engineering materials, the structure will need to be transported. If the pressure inside can be minimised, it will make it much lighter.
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7 æ¥éã® Magzter GOLD ç¡æãã©ã€ã¢ã«ãéå§ããŠãäœåãã®å³éžããããã¬ãã¢ã ã¹ããŒãªãŒã9,000 以äžã®éèªãæ°èã«ã¢ã¯ã»ã¹ããŠãã ããã
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LONG AGO, A LAKE ON MARS MAY HAVE BEEN SPRAWLING WITH MICROBES
Curiosity discovered manganese oxide in bedrock in a Martian region that may have been a shoreline billions of years ago
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MOON TOUR HELL
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THIS MONTH'S PLANETS
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UNIVERSE BEFORE TIME
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CLIMATE CHANGE IN THE SOLAR SYSTEM
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The Milky Way's halo is filled with âmagnetic doughnuts' as wide as 100,000 light years
The outer halo of the Milky Way is filled with magnetic fields that take the shape of vast doughnuts with diameters ranging from 12,000 to 100,000 light years, with the heart of our galaxy at their centre.
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The Pentagon wants the commercial space reserve to support military satellites in orbit
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DEEP SKY CHALLENGE : STELLAR TREASURES OF THE ARCHER AND SCORPION
Summer skies are stuffed full of amazing objects for your telescope - if you're prepared to stay up late