Astronauts

space lab

Using state-of-the-art analysis techniques, a team of NASA and Lockheed engineers from the Johnson Space Center (JSC) designed a seat that met the most stringent requirements demanded of the new seats by the Shuttle program. Materials considered for the Orbiter's seats must be as light-weight as possible, and have to withstand over 3 Gs worth of pressure multiplied by the maximum weight of the astronauts; about 600 pounds or 275 kg of force. The seats have removable seat cushions and mounting provisions for biomedical monitoring as well as emergency equipment, and communications connections to the crew altitude protection system. They also accommodate stowage of in-flight equipment.

The pilot's and commander's seats can be adjusted up, down, forward, and back. The total travel distance for the Z and X axes is 10 and 5 inches, respectively. Seat movement for each axis is provided by a single ac motor. If the seat motors fail, the seat can be adjusted manually. However, manual seat adjustment can only take place on orbit and is accomplished with a special seat adjustment tool provided in the in-flight maintenance tool kit. The backs of all of the seats could easily tilt forward or backward, with controls to manually lock and unlock the tilt.

The seats have two shoulder harnesses and a lap belt for restraints. The shoulder harnesses have an inertia reel lock/unlock feature. The unlocked position allows the shoulder harness to move. Upon reaching orbit, the mission and payload specialists' collapsible seats are removed and stowed in the mid-deck throughout the entire mission. No tools are required since the legs of each seat have quick-disconnect fittings. Each seat is 25.5 inches long, 15.5 inches wide and 11 inches high when folded for stowage.

Depending on the mission requirements, bunk sleep stations and a galley can be installed in the middeck. In addition, three or four seats of the same type as the mission specialists' seats on the flight deck can be installed in the middeck. Three seats over the normal three could be installed in the middeck for rescue missions if the bunk sleep stations were removed.

No unless you live in outer space

Stars twinkle due to the scattering effect of earth's atmosphere. In space this is no atmosphere, thus they do not twinkle.

The sky is black in space because there is no scattering of light as there is in the atmosphere. The earth appears blue from space due to the color of the gases in the atmosphere, and their reflected light on large bodies of water.

Ronald McNair.

oxygen and nitrogen

It arrives directly from the sun or comes in via the reflection off the earth, the moon, or anything else orbiting nearby.

1984.

Here are four quotes from various astronauts, regarding their impression of the Earth

as seen from space:

"Truly there is no more beautiful sight than to see the Earth from space beyond.

This planet is an exquisite oasis."

Ronald E. McNair, USA, STS 41-B (died in the Challenger accident)

"It is precisely this shift in viewpoint and what it implies for the capability of the

human being and for our view of the universe that makes it so powerful. Getting

outside of Earth and seeing it from a different perspective, having this sort of

explosive awareness, this abiding concern and passion for the well-being of Earth,

will have a direct impact on philosophy and value systems."

Edgar D. Mitchell, USA, Apollo 14

"I think that the minute I saw the view for the first time was really one of the most

memorable moments of my entire life. It's beyond description. I think it has

changed my insight into life. I've got more appreciation for the world we live in. I

think God has given us so much to be thankful for, and we are wasting so much

time trying to destroy it."

Sultan Bin Salman al-Saud, Saudi Arabia STS 51-G

"The Earth was small, light blue, and so touchingly alone, our home that must be

defended like a holy relic. The Earth was absolutely round. I never knew what the

word round meant until I saw the Earth from space."

Aleksei A. Leonov, Voskhod 2, Soyuz 19

It is a type of motion sickness experienced while astronauts adapt to a weightlessness environment.

not a discovery for AIDS

i think that astronauts usually get about six hours of sleep every night when they are in space.

The behavior of the electric charges in the electronics is a branch of scientific study. The application of the electronics is technology.

Rakesh Sharma

Chris Hadfield is on the International Space Station, not the Mir space station. Those two space stations are not the same. The reason he is there is to conduct space related research.

Nobody has orbited space but some have orbited the earth and the moon.

a space lab!

No, allegedly does not mean roughly. Allegedly actually means something that has been said, but has not yet proven true.

It's called a space walk when a astronaut is "walking" outside her spacecraft in outer space.

see wikipedia for more info:

http://en.wikipedia.org/wiki/Space_walk

Just like anyone else does. On the phone! If they are in space they don't talk to their family probably.

Space suits are worn to protect astronauts not only from the lack of air, but also from cold.

The reason why astronauts stay for only a few months on the International Space Station (ISS) is because of health. The prolonged weightlessness makes muscles and bones deteriorate. The ISS has special treadmills installed on it to help combat these effects but the bones and muscles still deteriorate. These negative effects are a major issue hindering the feasibility of traveling to Mars and beyond.

Yuri Gagarin was the first human both sent to space and also to orbit the Earth.