Why astronauts wear special suits

Because there is no air in space. If the pressure of atmosphere is changed suddenly, the blood vessels in our body will burst due to the pressure of the blood and other fluids inside.

This is why astronauts have to wear special pressurized suits-there is no air and, therefore, no air pressure in space. Our bodies are habitual of Earth's environment which protects us from harsh changes of temperature in space, and also pressure of atmosphere. In space the only mode of heat transfer is radiation unlike convection on Earth due to its atmosphere.

Thus, space-suit provides a Earth like temperature by a mechanism inbuilt in the suit. This suit maintains a Earth like pressure, so that all the organs specially beathing and blood-circulation takes place smoothly. Many more features like communication system, shield against micrometeors etc. Astronauts wear space suits because it protects them from the pressure and temperature in the vacuum of space. It provides an atmosphere similar to Earth 's including oxygen and nitrogen.

It provides water and the diaper handles waste. If they did not wear a space suit then this would mean they would die. However, this is because they wouldnt be able to breath so that they would not be able to breath in the oxygen they need to keep them alive.

Astronauts wear special suits because its vaccum in space. All rights reserved. Class-8 » Science. Force and Pressure. Share with your friends. Prashant Chauhan answered this. View Full Answer. Anukriti Jain answered this. Akanksha Chauhan answered this. Coldorange Sharma answered this. Ed White was the first American to perform a space walk.

A spacesuit must protect the astronauts from the harsh environments of space. In space there are very few air molecules. Note that air pressure is the result of the movement and collisions of air molecules. This absence of molecules is referred to as a vacuum. An astronaut's body fluids would fizz and bubble if he or she was wearing street clothes and was placed in a vacuum. Thus, one of the main purposes of the spacesuit is to provide a leak-proof bladder which stores air pressure to protect the astronaut's body.

This function is so important that sometimes spacesuits are referred to as pressure suits. A piece called the waist bearing helps the astronaut move and turn. A metal body-seal closure connects the lower torso to the hard upper torso. The lower torso has D-rings to attach tethers. Tethers are the cords that attach to the spacecraft so spacewalkers will not float away.

Some suits are plain white; some have red stripes; and others have candy cane stripes. These variations help to tell one spacewalker from another. Helmet Besides covering a spacewalker's head, the helmet has a Vent Pad. The helmet keeps the oxygen at the right pressure around the head.

The main part of the helmet is the clear plastic bubble. The bubble is covered by the Extravehicular Visor Assembly. The visor is coated with a thin layer of gold that filters out the sun's harmful rays. The visor also protects the spacewalker from extreme temperatures and small objects that may hit the spacewalker.

A TV camera and lights can be attached to the helmet. The astronaut wears the cap under the helmet. It has earphones and microphones. It connects to the radio on the spacesuit. Using the CCA, astronauts can talk with the rest of the crew and hear the caution and warning tones. Liquid Cooling and Ventilation Garment Most long underwear keeps people warm.

This underwear keeps spacewalkers cool. It is made of stretchy spandex material. It has Water is pumped through the tubes near the spacewalker's skin. The chilled water removes extra heat as it circulates around the crewmember's entire body.

The vents in the garment draw sweat away from the astronaut's body. Sweat is recycled in the water-cooling system. Oxygen is pulled in at the wrists and ankles to help with circulation within the spacesuit. Maximum Absorption Garment Because spacewalks typically last more than six hours without a break, spacewalkers wear adult-sized diapers with extra absorption material under their spacesuits.

Astronauts are usually connected to the station by a tether. If an astronaut should become untethered and float away, SAFER would help her or him fly back to the station. SAFER is worn like a backpack. It uses small nitrogen-jet thrusters to let an astronaut move around in space. Wrist Mirror A spacewalker cannot see the front of the Displays and Control Module while wearing the spacesuit. To see the controls, astronauts wear a wrist mirror on the sleeve.

Look at the settings on the front of the module. They are written backward. Spacesuits are specially designed to protect astronauts from the cold, radiation and low pressure in space. They also provide air to breathe. Wearing a spacesuit allows an astronaut to survive and work in space. When they are travelling in a Space Shuttle, or visiting the International Space station, they wear simple blue overalls, or even their own clothes. When they are in space, astronauts usually wear simple overalls, not a space suit.

Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extravehicular activity EVA , work done outside spacecraft.

Space suits have been worn for such work in Earth orbit, on the surface of the Moon, and en route back to Earth from the Moon. It is worn by both male and female astronauts. Astronauts have also died while training for space missions, such as the Apollo 1 launch pad fire which killed an entire crew of three. There have also been some non-astronaut fatalities during spaceflight-related activities.

As of , there have been 30 fatalities in incidents regarding spaceflight. It was commissioned and placed on the Moon by the crew of Apollo 15 at Hadley Rille on August 1, , next to a plaque listing the 14 men known who died…. Placement on the Moon. In October , Dimitri Malashenkov, one of the scientists behind the Sputnik 2 mission, revealed that Laika had died by the fourth circuit of flight from overheating.

The six Apollo missions that landed on the moon produced 96 bags of waste. According to the NASA History Office, white jettison bags, or trash bags, are definitely still on the moon, some containing astronaut poop. When the sun goes down, temperatures can dip to minus F minus C.

There are also no seasons on the Moon.