The aim was to eliminate surprises astronauts might experience in orbit, he said. To help make astronaut training more realistic, NASA commissioned Pearce in 2008 to create a scent that mimicked the odor that astronauts described. However, Nelson stressed that both of these ideas lack data from official studies. These outbursts generate smelly molecules known as polycyclic aromatic hydrocarbons, which are found in coal, food, oil and other materials, she noted. Senator Jake Garn of Utah (shown here with a color chart to assess skin color) suffered a bout of space sickness during his time on space shuttle mission STS-51D in April, 1985. "The other much more fun theory is that it's the smell relating to stellar explosions - dying stars," Nelson said. This atomic oxygen may cling to spacesuits, airlock walls and other items exposed to space, triggering chemical reactions that may explain the odor, such as ozone formation, Nelson said. Last seen this month floating through space near the International Space Station. Ultraviolet rays from the sun may split oxygen molecules (O2), which are made of two oxygen atoms, into single oxygen atoms. One has to do with oxygen floating around the International Space Station. There are a number of potential explanations for this smell. "We're not actually talking about a volume that has no particles," Miranda Nelson, a spacewalk flight controller in Mission Control at NASA's Johnson Space Center in Houston, told Live Science. Where might this scent come from? Although space is mostly empty, it is not a perfect vacuum. Related: What would happen to the human body in the vacuum of space? Rubio, floating in zero gravity inside an ISS compartment, reflected on his unexpected year in space as the end of his mission finally nears. The stars have some new hardware, specifically a white tool bag lost by NASA astronauts while on a repair mission. It reminded me of pleasant sweet smelling welding fumes. It reminded me of my college summers where I labored for many hours with an arc welding torch repairing heavy equipment for a small logging outfit. Another NASA astronaut, Don Pettit, described the smell of space at length in a NASA blog post, saying, "The best description I can come up with is metallic a rather pleasant sweet metallic sensation. Prokopyev, 48, an engineer and pilot, has now pulled two long station stints.Meanwhile, former NASA astronaut Thomas Jones compared the odor to ozone. It was the first spaceflight for Rubio and Petelin, 40, an engineer. NASA has no plans as of now for more yearlong missions. CNETs Holiday Gift Guide: The place to find the best tech gifts for 2018. He may hold on to this record for a while. 11 breathtaking images of NASA astronauts floating in space +8 more See all photos. Rubio had said the psychological aspect of spending so long in space was tougher than he expected. Naval Academy and another heading off to West Point. He ended up missing important family milestones including the oldest of his four children finishing her first year at the U.S. The NASA astronaut Frank Rubio grew a tomato in space, but then it disappeared. Rubio, 47, an Army doctor and helicopter pilot, said at a news conference last week that he never would have agreed to a full year in space if asked at the outset. Space Station to Earth: Houston, We Have Found the Tomato. “It’s good to be home,” Rubio said after being pulled from the capsule. Helicopters moved in with recovery crews to fetch the astronauts. Their SpaceX capsule parachuted into the Atlantic off the Florida. They experienced more than four times the force of gravity as their capsule streaked through the atmosphere and came to a touchdown in the barren Kazakh steppes, ending up on its side. Four astronauts returned to Earth early Monday after a six-month stay at the International Space Station. Prokopyev told ground controllers throughout the descent that all three were feeling good.
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