Although the Earth's gravity has a lesser effect on an astronaut orbiting the Earth in a spaceship than on a person on the surface of the Earth, this is not the reason why an astronaut experiences weightlessness. The space shuttle, Internat...
http://wiki.answers.com/Q/Why_are_astronauts_weightless...
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In space we feel weightlessness because the earth's gravity has less effect on us. Why do we not see the effect of the gravitational force between the various objects in a spacecraft? ... This is why astronauts feel weightless. The astronaut, the spaceship and everything inside it are falling towards the Earth.
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education.jlab.org/qa/gravity_01.html
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But that doesn't account for the weightless feeling that astronauts experience in space. The reason that astronauts feel weightless actually has to do with their position compared to their spaceship. We feel weight on Earth because gravity is pulling us down, while the floor or ground stop us from falling.
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www.qrg.northwestern.edu/projects/vss/docs/space-enviro...
www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-is-there-gravity-in-space.html
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To attend the event, or to arrange phone interviews, contact the newsroom at the Johnson Space Center by close of business Wednesday, Oct. 13. Video and still imagery is available of the new astronauts' flight training, including their first experience aboard NASA's "Weightless Wonder" aircraft.
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www.spaceref.com/news/viewpr.html?pid=15255%20
www.spaceref.com/news/viewpr.html?pid=15255%20
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As the International Space Station astronauts return to Earth after a three-month stay, learn about the effects of weightlessness on the body. ... We have often seen pictures of astronauts floating around inside the space shuttle, International Space Station or Mir. While weightlessness looks like fun, it places great...
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www.howstuffworks.com/weightlessness.htm
www.howstuffworks.com/weightlessness.htm
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The space shuttle astronauts are weightless when they are in orbit. Where does gravity stop? ... But, are they truly weightless and is gravity zero? The short answer is no, the shuttle astronauts are certainly not weightless as they orbit the Earth, rather only apparently weightless.
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www.uu.edu/DEPT/physics/Science%20Guy%202004/0410Weight...
www.uu.edu/DEPT/physics/Science%20Guy%202004/0410Weightless.htm
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It is important to realize that gravity does act upon the space shuttle. Yet, suppose you are holding a super-slingshot and are on top of a ... Astronauts in the shuttle are in orbit, and are thus in a constant state of free fall. Since the astronauts and shuttle fall at the same rate, a weightless environment results.
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www.pa.msu.edu/sciencet/ask_st/112295.html
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Diet is vital in weightless conditions. Astronauts follow a set diet and aim to maintain body weight and not loose a gram during a stay on the space station.
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www.spacecentre.no/English/Spaceflight/Astronauts/Weigh...
www.spacecentre.no/English/Spaceflight/Astronauts/Weightless_living/
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If there is no gravity in space, how do astronauts digest their food? Asked by: ... The astronauts are weightless while in orbit around the earth. But, intrestingly, this is precisely because there IS gravity. When an object is in orbit it is actually falling. But as with any thrown object as it falls vertically,
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www.physlink.com/Education/AskExperts/ae484.cfm
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