what astronauts breath in space?
414368
Those space suit the astronauts wear? THey are hooked up to and filled with not pure oxygen, like other answerers said, but the same mix of air as on earth -  78% nitrogen and 21% oxygen. This is done because pure oxygen is extremely flammable, and the astronauts of Apollo 1 died when a spark went off in their cockpit.
421068
Well if I remember this right...NASA was doing experiments a few years ago with rhubarb and pumpkin plants. The C02 oxygen exchange was the greatest. Also there was something about a genetically engineered algae they were trying out
336478
I'm pretty sure they have oxygen tanks on board or they might have an intake valve somewhere outside the plane for the few oxygen atoms floating around up there but the oxygen already in the cabin from take-off should be enough for the flight itself.
758386
Assuming there is oxygen present, in any direction. Most likely the direction which presents the input of oxygen i believe. Some great pictures on the NASA website linked below. There have been some controlled experiments for combustion done on Space Shuttles.
951545
Check out this site.  It has all the details for you:\n\nhttp://liftoff.msfc.nasa.gov/academy/astronauts/wannabe.html
106668
The external tank on the space shuttle uses liquid Hydrogen and liquid Oxygen.  I hope that helps.
890530
This is actually a good question, because all the shuttle deaths we heard about occurred while going into or down from space.  However, in 1971, three Russian cosmonauts of Soyuz 11 were killed by exposure to vacuum after undocking from space station Salyut 1 when a valve accidently opened.  Their craft subsequently landed normally, but a recovery crew discovered their dead bodies.
903583
Hi. Fighter pilots and astronauts. Courage and technical skill have always impressed me.
950284
The new CEV, "Crew Exploration Vehicle".\n\nWe're finally getting out of low earth orbit and back into the solar system!
988096
No space suits are worm, infact tubing has to be run inside the space suit with water running through it to keep the astronaut cool. A space suit is like a mini space ship, it is completly closed from space and there is now were for your body heat to go.So without the water filled tubing you would cook in the suit.
826278
Astronauts - Glenn, Schirra, and Carpenter. The other dead are, Grissom, Cooper, Slayton and Shephard.
309118
NASA is well explain, all that you want. Check this site.\n\nhttp://spaceflight.nasa.gov/living/index.html
486001
Space is generally considered a vacuum, meaning there is nothing, no air or anything.  There is a little bit of gas but it is so spread out that we consider it to be at zero atmospheres (pressure of air at sea level on earth is 1 atmosphere). There are a few hydrogen atoms per cubic centimeter in space. At sea level on earth, there are 25 billion billion molecules of gas per cubic centimeter.\n\nThe temperature in space is about 3 Kelvin, or 3 degrees above aboslute zero, or 460 below zero in Farenheit.\n\nThere is also virtual energy and virtual particles that are constantly popping in and out of existence, but on such a tiny tiny scale that it has no direct effect on humans. But if you are getting into detailed questions of motion of bodies in space or how light goes through space, it makes a difference.
2999
Pilot Astronauts\n\nEarly in the U.S. manned space program, jet aircraft and engineering training were prerequisites for selection as an astronaut. Today, scientific education and experience are equally important prerequisites in selecting both pilots and mission specialists.\n\nPilot astronauts play a key role in Shuttle flights, serving as either commanders or pilots. During flights, commanders are responsible for the vehicle, the crew, mission success and safety -- duties analogous to those of the captain of a ship. Shuttle commanders are assisted by pilot astronauts who are second in command and whose primary responsibilities involve controlling and operating the Shuttle. During flights, commanders and pilots usually assist in spacecraft deployment and retrieval operations using the RMS arm or other payload-unique equipment on board the Shuttle. \n\nMission Specialist Astronauts\n\nMission specialist astronauts, working closely with the commander and pilot, are responsible for coordinating on board operations involving crew activity planning, use and monitoring of the Shuttle's consumables (fuel, water, food, etc.), and conducting experiment and payload activities. They are required to have a detailed knowledge of Shuttle systems and the "operational characteristics, mission requirements and objectives and supporting systems for each of the experiments to be conducted on the assigned missions." Mission specialists perform on-board experiments, spacewalks (called extravehicular activity (EVA) and payload handling functions involving the RMS arm. \n\nPayload Specialists\n\nThis newest category of Shuttle crew member, the payload specialist, is a professional in the physical or life sciences or a technician skilled in operating Shuttle-unique equipment. Selection of a payload specialist for a particular mission is made by the payload sponsor or customer. For NASA-sponsored spacecraft or experiments requiring a payload specialist, the specialist is nominated by an investigator working group and approved by NASA.
122595
Hope this helps...\n\nAstronaut Requirements\n\n  \n\n \nHave you ever wondered if you have what it takes to become a NASA Astronaut? The term "astronaut" derives from the Greek words meaning "space sailor," and refers to all who have been launched as crew members aboard NASA spacecraft bound for orbit and beyond. Since the inception of NASA's human space flight program, we have also maintained the term "astronaut" as the title for those selected to join the NASA corps of astronauts who make "space sailing" their career profession. The term "cosmonaut" refers to those space sailors who are members of the Russian space program. \n\nThe crew of each launched spacecraft is made up of astronauts or cosmonauts drawn from the various categories described in these pages. The crew assignments and duties of commander, pilot, mission specialist, or payload specialist are drawn from the NASA professional career astronauts. Mission Applicants for the Astronaut Candidate Program must be citizens of the United States.  \n\nPilot astronauts serve as both Space Shuttle and International Space Station commanders and pilots. During flight, the commander has onboard responsibility for the vehicle, crew, mission success and safety of flight. The pilot assists the commander in controlling and operating the vehicle. In addition, the pilot may assist in the deployment and retrieval of satellites utilizing the remote manipulator system, in extravehicular activities, and in other payload operations. \n\nBasic requirements for an Astronaut Pilot include the following: \n\n1. Bachelor's degree from an accredited institution in engineering, biological science, physical science, or mathematics. An advanced degree is desirable. Quality of academic preparation is important. \n\n2. At least 1,000 hours pilot-in-command time in jet aircraft. Flight test experience is highly desirable. \n\n3. Ability to pass a NASA space physical which is similar to a military or civilian flight physical and includes the following specific standards: \nDistant visual acuity: 20/100 or better uncorrected, correctable to 20/20 each eye. \nBlood pressure: 140/90 measured in a sitting position. \nHeight between 64 and 76 inches. \n\nMission specialist astronauts work with the commander and the pilot and have overall responsibility for coordinating operations in the following areas: systems, crew activity planning, consumables usage, and experiment/payload operations. Mission specialists are trained in the details of the onboard systems, as well as the operational characteristics, mission requirements/ objectives, and supporting equipment/systems for each of the experiments conducted on their assigned missions. Mission specialists perform extravehicular activities (EVAs), or space walks, operate the remote manipulator system, and are responsible for payloads and specific experiment operations.\n\nMission specialist astronauts, working with the commander and pilot, have overall responsibility for the coordination of Shuttle operations in the areas of crew activity planning, consumables usage, and experiment and payload operations. Mission specialists are required to have a detailed knowledge of Shuttle systems, as well as detailed knowledge of the operational characteristics, mission requirements and objectives, and supporting systems and equipment for each payload element on their assigned missions. Mission specialists will perform extravehicular activities, payload handling using the remote manipulator system, and perform or assist in specific experiment operations.\n\n\nBasic requirements for a Mission Specialist include the following: \n\n1. Bachelor's degree from an accredited institution in engineering, biological science, physical science, or mathematics. Degree must be followed by at least three years of related, progressively responsible, professional experience. An advanced degree is desirable and may be substit
1138971
Environmental groups have recently voiced concern that exhaust from the space shuttle and other rockets could harm the protective ozone layer. But measurements taken by satellites after shuttle launches do not show any sign of stratospheric ozone destruction, atmospheric scientists report.\n\nSolid-propellant motors used to loft some rockets pose a potential threat to the ozone layer because their exhaust contains chlorine, which in some forms can destroy ozone. Indeed, a scientific flight through a rocket's exahust plume in the 1970s detected a 40 percent decrease in ozone levels in the plume, reports Steven Aftergood of the Washington, D.C.-based American Federation of Scientists in the Sept. 20 JOURNAL Of GEOPHYSICAL RESEARCH. Aftergood suggests that launches may produce local ozone "holes" that persist for several hours.\n\nIn the same journal, Richard McPeters of NASA's Goddard Space Flight Center in Greenbelt, Md., and his colleagues respond to Aftergood's comments by examining satellite measurements of ozone in the shuttle launch area. They find no detectable ozone decrease after several launches.
628242
Plants.\n\nThey breathe in CO2 and breathe out Oxygen