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The first and most obvious hazard is the lack of oxygen which could cause an astronaut without suitable protective clothing to suffocate.
In fact space is practically a vacuum (there is virtually nothing there at all), this means that unprotected astronauts can suffer from "decompression sickness". This is because at earth's surface there is a significant pressure acting on everything from the weight of the air in the atmosphere. On earth we don't normally notice this as we are used to it. All the fluid and dissolved gasses in our bodies is broadly at the same pressure as the atmosphere and so the two cancel each other out. However in space where there is no atmosphere pushing down or around an astronaut, the pessure is not balanced and without protective clothing, dissolved gasses in the blood and other tissues will come out of solution forming bubbles which would be extremely painful and rapidly prove fatal and would cause significant swelling.
On earth we are protected from significant amounts of solar radiation by the atmosphere and the Earth's magnetic field. In space no such protection exits and so astronauts face significantly increased exposure to all types of radiation.
There is also the increased risk of meteoroids (small metallic or silicate clasts ranging from sand grain size upwards) that travel at very high velocities causing damage to space vehicles (or in extremis killing astronauts) because there is no atmosphere to burn up (due to air resistance and friction) these debris.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThey get no gravity which will make them weaker
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To an astronaut in a space craft the sky appears to be?
To an astronaut in a space craft, the sky appears to be black.
Who is a person who goes to outer space?
an astronaut
How many astronaut live in space?
none of them
What are the people who travel into space called?
An Astronaut.
What anastronaut working in Space near the International space station says she feel weightless. What does she mean Does the astronaut no have weight?
It actually means that the astronaut is in free fall, and doesn't FEEL gravity. Gravity does affect the astronaut, so the astronaut will still be accelerated towards Earth. However, the astronaut won't feel the gravity.
Is an astronaut someone who works at a space station?
an astronaut is someone that goes up in to space
Who was the first American astronaut to go into outer space?
Alan sheperd was the first astronaut in space.
To an astronaut in a space craft the sky appears to be?
To an astronaut in a space craft, the sky appears to be black.
How does an astronaut breathe in space?
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).
Who was the first astronaut to walk in space?
Astronaut Yuri Gagarian
Does an astronaut in space have inertia?
Yep, if an astronaut has mass, they will have inertia.
How can you Use the word astronaut in a sentence?
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.
Where can you find an astronaut?
in space
What is the name of the first astronaut that flew in space?
The name of the first astronaut to fly in space was Alan .b. Shepard.
Kindergarten project What astronaut need for outer space?
An astronaut needs a space suit that will allow him or her to stay safe in zero gravity. The astronaut also needs a camera that will record images from outer space.
What is a person who travels in space?
A person that travels in space is known as an Astronaut, also referred to as a Cosmonaut. An astronaut is a person who travels in space. They are usually trained to operate spaceships and other machines that they may need to survive in space.
Is there a job related to an astronaut?
An astrologist maybe. Some astronomers study space without going to space lol
