The main reason is that without it, the side of his body facing the sun would cook and the other side in the shade would freeze. In space, without any protection against the suns rays, the sun side would heat up to 250 degrees F, It would be -250 degrees F, in the shade. He would need the suit for uv radiation protection as well.
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
To an astronaut in a space craft, the sky appears to be black.
For Multiple reasons. 1) There is no air, therefore the astronaut must wear the suit, or rather the suit's helmet to breathe. 2) It protects him from physical damage when handling volatile or dangerous substances/ objects.
Oxygen (O2) is necessary to the respiration and the survival of astronauts in the near vacuum of space. Astronauts does not have the breathable atmosphere on Earth in space. The space suit protects them from the lethal cold and vacuum of space by keeping him in temperature controlled and pressurized environment.
an astronaut
The suit might lose oxygen and the astronaut could suffocate.
This depends upon where the astronaut is. Inside the International Space Station, astronauts usually wear light, informal clothing. If the astronaut exits the station to do a space walk or other such mission, the astronaut will wear an air tight space suit, in order to be able to continue breathing.
A "space walk" does not refer to actual walking. Extra-Vehicular activity, or space walk, refers to work being done by an astronaut outside of the spacecraft.
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
Only an astronaut really knows but experience says unless you are wearing restrictive clothing, a space suit, in space the normal method still works. I have heard that astronauts who discover that they itch in space have to be patient as the space suits these days are not designed to allow itches to be scratched in space.
an astronaut is someone that goes up in to space
Alan sheperd was the first astronaut in space.
To an astronaut in a space craft, the sky appears to be black.
The astronaut's space helmets allows them to breathe in space! It is connected to an air supply.An astronaut's space suit keeps him from harm from outer space objects!They live in an airtight environment (suit, ship, or station).
Astronaut Yuri Gagarian
Yep, if an astronaut has mass, they will have inertia.
Space-based exploration and study is the primary role of an astronaut. A space traveler who is not primarily an astronaut is called a mission specialist.