In 2015, NASA astronauts ate space-grown lettuce in orbit for the first time; fresh food may also help support crew morale on long missions

On August 10, 2015, three astronauts aboard the International Space Station ate lettuce they’d grown themselves in area, about 250 miles above Earth. In line with a peer-reviewed research by Massa and colleagues, revealed within the journal Open Agriculture, the crop was grown as a part of an experiment referred to as VEG-01, a {hardware} validation take a look at designed to test whether or not the Veggie growth chamber may operate correctly in microgravity and develop meals secure sufficient for the crew to eat. The astronauts picked crimson romaine lettuce, cleaned the leaves with sanitizing wipes, and ate them with a splash of olive oil and balsamic vinegar. That will seem to be a small factor, but it surely answered a query NASA has been working towards for years: can a crew safely develop, harvest, and eat its personal meals whereas residing off the planet?

A historic chew 250 miles above Earth

NASA astronaut Kjell Lindgren harvested the lettuce, a crimson selection referred to as Outredgeous romaine, and shared it with Scott Kelly, who was about 4 months into what could be a virtually year-long keep on the station, and Kimiya Yui of Japan’s space company, JAXA. As nothing goes straight from plant to plate in orbit, the crew of Expedition 44 wiped down the leaves with citric acid-based sanitizing wipes earlier than consuming. Kelly stated it tasted like arugula. Lindgren referred to as it superior. The 2 Russian cosmonauts, Gennady Padalka and Mikhail Kornienko, have been out of the station on a spacewalk, and the crew reserved a few leaves for them later. This crop, grown underneath the VEG-01B spherical of testing, was the primary space-grown meals NASA cleared for its astronauts to eat in orbit. An earlier crop grown on the station again in 2014, VEG-01A, had by no means been tasted in any respect, since these leaves have been frozen and despatched residence for meals security testing that finally cleared the way in which for this second harvest to be eaten contemporary.

Rising salad with out soil or gravity

Rising something with out gravity requires a special method. There is no such thing as a soil within the Veggie system. As an alternative, seeds are saved in small pouches, referred to as plant pillows, stuffed with a clay-based rising medium and slow-release fertilizer, and wicks draw water up from a reservoir under. In weightlessness, you possibly can’t simply pour water out, so this wicking system is what retains the roots moist. Above the crops is a financial institution of crimson, blue, and inexperienced LED lights. This crop was activated on July 8, 2015, and grew for 33 days earlier than it was prepared to reap.

Passing the meals security take a look at
Earlier than any lettuce may very well be eaten by an astronaut, there was a excessive bar of security to clear. In a follow-up research, Khodadad and colleagues at NASA’s Kennedy House Heart, titled “Microbiological and Dietary Evaluation of Lettuce Crops Grown on the Worldwide House Station,” examined a number of lettuce harvests from the Veggie system, together with the unique VEG-01 crop, for microbial security and dietary high quality. The leaves have been colonized by numerous microbial communities, however screening didn’t detect any potential human pathogens. Researchers additionally seen some variations in mineral content material and whole phenolic compounds between the space-grown and ground-grown lettuce, however no vital distinction in antioxidant-related compounds like anthocyanins. The research concluded that leafy greens grown this fashion have been secure, edible, and may very well be a helpful addition to an astronaut’s weight loss plan.Greater than a meal: The psychological increase

Recent meals does greater than fill a plate in area. A 2017 assessment by Odeh and Man on the College of Florida, additionally revealed in Open Agriculture, examined years of analysis on how people reply to crops and greenery, and argued that gardening may provide actual psychological advantages throughout lengthy area missions. One motive the sterile, mechanical inside of a spacecraft can have an effect on a crew’s temper over time is biophilia, the idea that folks have a pure pull towards different residing issues, the paper says. Astronaut Peggy Whitson has described an analogous impact in her personal account of an earlier station experiment: tending a small crop of soybeans in 2002, she wrote in a letter residence that seeing one thing inexperienced once more “had an actual impact” on her temper.

Paving the way in which to Mars

As NASA seems to be towards longer missions farther from Earth, resupply turns into extra expensive and fewer frequent, and packaged meals can lose dietary worth the longer it sits in storage, a part of the rationale behind NASA’s funding within the Veggie program. Rising contemporary produce might help replenish dietary consumption and provides crews one thing to have a tendency contained in the spacecraft. The August 2015 lettuce, shared between three astronauts, marked an early, small-scale proof that farming in area is feasible.