At the moment, Soyuz is used at Baikonur to launch astronauts to the International Space Station.
They're composed of high-energy, highly penetrating particles, and astronauts would be exposed to them chronically.
Most see a greater role for the private sector in launching astronauts to low-Earth orbit.
The five Atlantis astronauts are the space station's first visitors in more than two months.
Civil engineers don't command the renown of statesmen, astronauts or generals, but maybe they should.
Continue ferrying supplies to Mir but stop having U.S. astronauts live on the station.
Suits became more technologically sophisticated as Gemini astronauts started spacewalking and Apollo astronauts went moonwalking.
However, there is some evidence for the weakening in all muscles, including the hearts of astronauts.
The US space agency's currently stated aim is to return astronauts to the Moon by 2020.
The ISS-FIT competition program is creating new dietary tracking applications for use by astronauts.
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"This is a spacecraft but it feels like a caravan, " Paul told his fellow astronauts.
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Right before the departure, the ISS astronauts thanked the ship's crew, urging them to "stay safe".
We know that the lives of our astronauts depend on how well we do our jobs.
In younger astronauts, Glenn said, the "aging" effect reverses itself when they return to Earth.
Some will be student "astronauts, " working side-by-side with scientists who use computers to control the rover.
Another challenge for the mission will be keeping the astronauts healthy in both body and mind.
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Since Expedition 1 in 2000, the space station has been visited by 204 astronauts.
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Do expect Chinese astronauts to turn up at European astronaut training facilities, and vice-versa.
It's also where the astronauts who went to the moon walked out before their missions.
The first thing astronauts have to do is make sure they are seated properly.
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Starting in November, NASA will start taking applications for a new class of astronauts.
Additionally, the solar minimum during that time will also limit the radiation exposure to the astronauts.
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Mr Nelson's book contains compelling portraits of the astronauts: the American heroes of the age.
"We've always flown astronauts between the ages of 30 and 60, " says NASA administrator Daniel Goldin.
Word of advice if you want to give it a shot: learn your astronauts.
Experiments on monkeys suggest that the health hazards facing astronauts may be greater than previously thought.
In 1972, "Apollo 16" astronauts John Young and Charles Duke explored the surface of the moon.
They have to make the call, and the astronauts are merely bystanders at that point.
It carried two astronauts this time, one more than China's first manned flight in 2003.
It was the Saturn V rocket that enabled the US to send astronauts to the Moon.
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