What happens if you go out into space without a spacesuit
Can a person survive without a suit in outer space? You've probably even ever asked this question. The people raging set of opinions, including the unfortunate astronaut must turn into a piece of ice or should break inside, but whether these allegations are true? Let's look at it from a scientific point of view.
A person does not become instantly frozen solid? Heating or cooling occurs either due to contact with cold external environment, either through thermal radiation.
vacuum environment in no contact with nothing. And to be precise, in a vacuum there is a very rarefied gas, which due to its discharge of gives a very weak effect. In thermos vacuum used just to keep warm! Not having contact with cold matter, the hero does not feel the searing cold.
Freezing 
have long As for radiation, the human body, hitting the vacuum will gradually dissipate heat radiation. In doing thermos flask mirrored wall to keep radiation. This process is rather slow. Even if there is no astronaut suit, but there's clothing, it will help keep warm.
Fry? 
But you can get a tan. If it happens in space close to the star, you can get a sunburn on the exposed areas of the skin - as excessive tanning on the beach. If it happens somewhere in Earth orbit, the effect will be stronger than on the beach, as there is no atmosphere, which protects against UV hard. 10 seconds is sufficient to produce a burn. Yet this is not a searing heat, besides clothing should also be protected. And if we are talking about a hole or crack in a spacesuit helmet, then on this subject you should not worry.
Saliva Boiling
 Boiling liquid depends on the pressure. The lower the pressure, the lower the boiling point. Therefore, the liquid will evaporate vacuo. It was found in experiments - not once, but saliva boils, because the pressure is almost zero, and the temperature of the language - 36 C. Apparently, the same thing will happen with all the mucous membranes (eyes, lungs) - they will dry out, if only from the body will not enter a new mucus.
By the way, if you take not just a liquid film, and a large amount of water, then, perhaps, will be the same effect as "dry ice" outside to evaporation, with evaporation heat is lost rapidly, due to this inner part freezes. We can assume that water ball in space partially evaporated, and the rest will become a piece of ice.
Blood boil? 
elastic skin, blood vessels, the heart will create enough pressure to nothing boiling.
champagne effect is also not foreseen
Do divers have such trouble as the bends. The reason - what happens with a bottle of champagne.
Besides boiling there is dissolution of gases in the blood. When the pressure drops, the gases are transformed into vials. In champagne goes dissolved carbon dioxide, while the divers - nitrogen.
But this effect occurs at high differential pressures - at least several atmospheres. And if it enters the vacuum drop only one atmosphere. The article on the subject says nothing, no symptoms described - apparently this is not enough.
air inside break?
assumed that the victim of his exhale - and therefore did not break. And if you do not exhale? We estimate the risk. Let the pressure is maintained in the suit of 0.4 atm, which corresponds to an altitude of 7 km.
If a person tries to hold his breath, the air gets in the way of the soft palate. If there is an area at least 2 × 2 cm, then get a load of 40 kg. Unlikely to survive the soft palate - the man himself exhale as deflated balloon.
suffocate man?
That is basic and a real threat. I have nothing to breathe. How many people can survive without air? Trained divers - a few minutes, untrained people - not more than a minute.
Yet! It's a breath when the lungs full of air with the remnants of oxygen. And there, remember, have to breathe. How many people can hold a simple exhale? 30 seconds. But! On the exhale, the lungs are not "skukozhivayutsya" to the end, there is little oxygen. In space, apparently, will be even less oxygen (how many manage to keep). Specific time in which the person loses consciousness from asphyxiation known - about 14 seconds.