Header image: Mizuna lettuce growing aboard the International Space Station before being harvested and frozen for return to Earth. Image credit: NASA
21.08.2023 - 11:41 / theunconventionalgardener.com / guest
Header image: The atmosphere protects life on Earth from the effects of the Sun’s radiation, but space travel is a different matter. (NASA/SDO)
Hamid Kian Gaikani, University of British Columbia
Nuclear fusion reactions in the sun are the source of heat and light we receive on Earth. These reactions release a massive amount of cosmic radiation — including x-rays and gamma rays — and charged particles that can be harmful for any living organisms.
Life on Earth has been protected thanks to a magnetic field that forces charged particles to bounce from pole to pole as well as an atmosphere that filters harmful radiation.
During space travel, however, it is a different situation. To find out what happens in a cell when travelling in outer space, scientists are sending baker’s yeast to the moon as part of NASA’s Artemis 1 mission.
Cosmic radiation can damage cell DNA, significantly increasing human risk of neurodegenerative disorders and fatal diseases, like cancer. Because the International Space Station (ISS) is located in one of two of Earth’s Van Allen radiation belts — which provides a safe zone — astronauts are not exposed too much. Astronauts in the ISS experience microgravity, however, which is another stress that can dramatically change cell physiology.
As NASA is planning to send astronauts to the moon, and later on to Mars, these environmental stresses become more challenging.
The most common strategy to protect astronauts from the negative effects of cosmic rays is to physically shield them using state-of-the-art materials.
Several studies show that hibernators are more resistant to high doses of radiation, and some scholars have suggested the use of “synthetic or induced torpor” during space missions to protect
Header image: Mizuna lettuce growing aboard the International Space Station before being harvested and frozen for return to Earth. Image credit: NASA
Word by Matt de Neef, The Conversation
Header image: Tokyo Bekana Chinese cabbage leaves prior to harvest aboard the International Space Station. Photo credit: NASA
Header image: The greenhouse at McMurdo Station in Antarctica is the only source of fresh food during winter. Eli Duke/Flickr, CC BY-SA
Patrick Major, University of Reading and Chris Scott, University of Reading
Stephen M. Cullen, University of Warwick
May is a lovely month in the garden, although it’s a busy time for the gardener! It’s a good sowing month, plants will be growing strongly in the higher temperatures and light levels, and there will be some harvests on offer. You’ll also be able to watch the birds, bees, butterflies and other wildlife enjoying your organic plot!
Header image: Chinese astronauts Tang Hongbo, Nie Haisheng, and Liu Boming during ceremony before heading to Tiangong. ROMAN PILIPEY/EPA
Matt Damon as astronaut and exobotanist Mark Watney in the film The Martian grows crops on Mars. (20th Century Fox/Handout)
Header image: One of the Vanguard satellites being checked out at Cape Canaveral, Florida in 1958. NASA
Join Emma the Space Gardener on the Tiangong space station to learn about China’s botanical experiments in space, and why Chinese consumers are eagerly awaiting rice from heaven. Plus – what was the first plant grown in space?
Dr Federica Brandizzi of Michigan State University is the Principal Investigator for the Life Beyond Earth: Effect of Spaceflight on Seeds with Improved Nutritional Value study, an experiment headed for the Moon on NASA’s Artemis I mission. In this short video, she explains why she’s sending plant seeds into space.