If you float in space without a suit you would quickly lose consciousness within 15 seconds or less and die as a result o flack of oxygen and other factors.
Space has a vacuum which would cause your bodily fluids to boil and the lack of pressure in space would also cause your lungs to rupture.
And your body would also be exposed to extreme temperatures and radiation.
You could not survive in space without a spacesuit.
The initial effects of vacuum exposure in space may not be immediately fatal, the lack of oxygen in space would render you unconscious in around 15 seconds.
And complete brain death would follow soon after, unless you would rescued and resuscitated within a couple of minutes.
The only way to survive in space is to wear a spacesuit which is crucial to keeping you alive and keeping you in an oxygenated environment to keep you alive.
Some parts of the spacesuit are made of many layers of material, and each layer does something different.
Some layers of the spacesuit keep oxygen in the suit and other layers protect astronauts from space dust.
And under the spacesuit, astronauts also wear another piece of clothing.
When in space what happens to the blood in space is that the blood and other bodily fluids shift towards the head and potentially lead to increased blood volume in your upper body as space is a weightless environment.
The fluid shift in space can also cause a variety of physiological changes, including reduced blood volume and decreased red blood cell mass as well as an increased risk of blood clots.
When an astronaut returns to Earth from space, the body needs time to readjust to the gravity which can cause fainting and dizziness upon standing.
In space the blood does not pool as such, thus lowering the pressure in the feet but increasing it in the torso or head.
Without a space suit though the blood would boil and freeze and you would die.
While space is cold you would boil in space without a spacesuit as your blood, bile and even your eyeballs would boil furiously due to the low pressure of space.
Water would also boil in the vacuum of space but it would also freeze.
And the water would also boil at extremely low temperatures but it would also freeze due to the cold temperatures of space.
So like the water your blood, bile and eyeballs would boil and would also freeze in space as well.
Without a spacesuit in space, you would become unconscious within 15 seconds as a result of the lack of oxygen in space and your blood and bodily fluids would also boil and then freeze due to the extremely low air pressure and your body's tissues would also expand from the boiling fluids.
Immediately after the Big Bang occurred, the universe was a hot, dense state and was far hotter than anything we now observe.
And over time, as the universe expanded, the universe also cooled down.
And the cosmic microwave background radiation is also remnant of the early, hot phase and it also provides evidence of the universe's initial high temperature.
The universe began in an extremely hot and dense state and the Big Bang theory describes the initial expansion.
As the universe expanded, the energy density decreased and the temperature dropped.
The cosmic microwave background is the afterglow of the Big Bang, which is a faint radiation which permeates all of space.
And it's currently at a temperature of about 2.7 Kelvin or -455F, although it was much hotter in the early universe.
After the Big Bang, the universe was about 10 billion degrees Celsius and other research says that within minutes the temperature had dropped enough for the formation of hydrogen and helium nuclei.
The universe still continues to expand and the CMB radiation also continues to cool.
The early universe was a fiery place.
Space has a smell that is like gunpowder, sulfur, ozone and a faint acid smell.
We can't smell space directly, because our noses don't work in a vacuum.
However the astronauts aboard the ISS have reported that they notice a metallic aroma – like the smell of welding fumes – on the surface of their spacesuits once the airlock has re-pressurized.
Life in space is similar to life on earth however if yo go out into space you have to wear a space suit and other times you have to be in the space shuttle and there's also no gravity to hold you down.
Space is very dangerous – and without protection, people would not be able to survive there.
In space, there's no air – so you couldn't breathe. It's cold – so you'd freeze.
And there's lots of nasty radiation (from the Sun, and from the rest of the Universe), so you'd get really, really bad sunburn.
The only significant differences from living on Earth are that they operate in the confined space of the Space Shuttle orbiter cabin and that they, and all objects inside the cabin, float.
Because of microgravity on the Space Shuttle, some jobs, like handling tools and fluids, become more difficult.
There have been several people that have died in space.
There have been at least 18 deaths in space which include preparation for entry in space and those in space and some on return to earth from space.
A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents.