### person | traveler:

Astronaut
* All astronauts have some special skills, either as pilots or scientists
  - lose some calcium and bone mass
* Eat in orbit.
* Many astronauts are mission specialist astronauts
  - describe feelings of wonder upon viewing the earth from space
  - experience motion sickness, at least for a while
  - find it difficult to stand without fainting immediately after their return to Earth
* Many astronauts have advanced degrees
  - doctoral degrees
  - multiple degrees in different fields and many are pilots
  - trouble adjusting to zero gravity
  - spend weeks or even months in space at a time
* Most astronauts consume calories.
* Most astronauts eat food
  - meals
  - moist food
  - experience weightlessness
* Most astronauts feel body weight
  - find it hard to stand during their first days back on Earth
* Most astronauts have acceleration
  - homes
  - lose life
  - report having difficulty sleeping in microgravity
  - return to earth
  - see earth
  - sleep for just six hours
  - train for two to ten years before their first space mission
* Most astronauts use devices
  - flush toilets
  - machines
  - tools
  - workout machines
* Some astronauts are doctors
  - pilot astronauts
  - become ill while traveling in space, their ailment being similar to car sickness
  - experience vision problems
  - find it difficult to float in sleeping bags
* Some astronauts have degrees in physics
  - learn to drive the space shuttle because they practiced and practiced
  - lose weight
  - rely on inertia
  - say that adaptation to space gets easier with each mission they fly
  - stay in space, six months or more, testing equipment and solitude
  - use a meal tray to hold the food containers
  - walk in space, while others stay inside
* adopt a workaday attitude toward life in outer space.
* also experience bone loss, muscle atrophy and other physiological alterations
  - the discomfort of a swollen head
  - report sleeping difficulties in space
  - wear fine-fabric gloves inside the outer glove units for comfort
* are a little taller in space than on Earth
  - select group of employees with unique occupational risks
  - all experts in their fields
  - books
  - government workers
  - humans
* are located in moons
  - orbits
* are located in space shuttles
  - stations
  - spaceships
  - one type of person that goes into space
  - pilots or mission specialists
  - scientists who work beyond the earth's atmosphere in the frontier of outer space
  - skilled workers
  - taller in space because on earth they're bones are pushed closer together by gravity
  - trained in use
  - travelers
  - used for weightlessness
* are, by definition, superachievers.
* become a little taller in space
  - very thirsty while working in space
* brush their teeth just like they do on Earth
  - teeth, take sponge baths, and go to the bathroom in space
* can also be strapped onto cycling and rowing machines
  - be pilots or have military flight training
  - grow an inch in a few days
  - lose bone density while in zero-gravity conditions for extended periods
  - see meteors burn up in the atmosphere
  - sleep standing up, upside-down, or even in the air
  - thus sleep in any sort of position regardless of where they are
  - use a treadmill as a form of resistance exercise
* carry a limited water supply.
* claim that after travelling into space their view of Earth has changed.
  - energy
  - enough energy
  - sufficient calories
* deal with the challenges of working in a spacesuit
  - harsh realities of survival in space
* depend on special gases to detect leaks in their space equipment.
* do experiments
  - special exercises while they are in space to keep from losing bone mass
* don their flight suits.
* eat food from plastic bags by squeezing it out
  - freeze-dried foods and drink though straws when they are in space
  - slowly though, just like on Earth, as work schedules permit
* even experience space-sickness.
* exercise their arms by pushing upward on the bar while walking.
* experiencing high g forces on liftoff weigh more than their normal weight.
  - weightless when they are in outer
* float around weightless, sleep standing up and take sponge baths instead of showers.
* fly to various destinations to conduct research and experiments.
* generally are specialists in at least one field of study and knowledgeable in several.
* go out into space
  - to school to learn what to do in space and how to act in emergencies
* have a lot of trouble scratching their noses and ears during a space walk
  - reduced red blood cell mass after exposure to space
  - college degrees in science or engineering
  - cumulative legal limits of radiation that they can be exposed to
  - some changes in their bones when they're up in space
  - to exercise at least two hours every day in space
* includes arms
  - body substances
  - cell membranes
  - cells
  - corpi
  - cytoplasm
  - heads
  - human bodies
  - legs
  - material bodies
  - necks
  - nuclei
  - personality
  - plasma membranes
  - sections
  - vacuoles
* join crews.
* keep daily journals of their time in space.
* lose a lot of bone density in space due to the absence of gravity
* make appearances
  - big wobbly drops of water float around in a space-craft
* now have all different backgrounds.
* often choose strong-tasting food to combat the loss of taste
  - experience weakening of their hearts and blood vessels in space
* perform maintenance
  - routine maintenance
* practice underwater to learn how to work in the weightlessness of space.
* receive psychological and physical training for space flight.
* regularly talk to their families and school children while in orbit.
* say it's what they do in their spare time onboard.
* sleep in bags that are attached to one of the sides of the ship
  - only six hours each night, on average
* spend long spans of time in space, and they have to eat
  - more time in simulators than in space
* take actions
  - medicine to alleviate the pain or discomfort caused by the body's adaption to space
* tend to sleep poorly.
* to eat food
  - orbit earth
* train for years in order to explore space.
* travel into space aboard space shuttles
  - and they use the Earth's gravity to orbit around it
* use a device that resembles a toilet seat
  - bright lights to signal day and red goggles to signal night to their bodies
  - hand holds to pull themselves along
  - knife, fork, and spoon
  - only straws to eat
* use special instruments to observe the earth, the stars, and the sun
  - kinds of soap and shampoo
  - the treadmill or exercise bike and bungee cord themselves in place
  - two-hand controllers to manage the movement of the robotic arm
* wear business attire under their spacesuits
  - spacesuits when they fly in the space shuttle , rockets , or space stations
  - special helmets for space travel
  - suits in outer space because humans can only exist in a certain atmosphere
  - underwear lined with water tubes to keep cool
  - various types of clothing for all aspects of a mission to space
* work for the federal government.
+ Space suit: Protective clothing :: Spaceflight
  * A 'spacesuit' is an article of protective clothing worn by astronauts when they travel into outer space or into the upper atmosphere. Spacesuits are completely sealed, so that an astronaut can survive in the harsh, cold, and airless environment of space. Spacesuits have their own heating and cooling systems and a radio communication system. Spacesuits also provide a supply of fresh air for the astronauts to breathe and create a normal atmospheric pressure. Spacesuits cover the entire body, and they have gloves for the hands and a helmet for the head, including a clear visor for the face. Astronauts wear spacesuits when they fly in the space shuttle, rockets, or space stations.