What happens if an astronaut takes off their suit on the Moon and in the solar system planets?
The Moon is a hostile and unforgiving environment for any living being. Its lack of atmosphere and pressure turns any exposure without a spacesuit into an experience that would lead to a painful and inevitable end of life.

If an astronaut decided to remove the suit on the lunar surface or their suit were to rupture, the absence of pressure would cause the gases in the blood and lungs to expand uncontrollably, causing explosive decompression, i.e., the astronaut’s body would implode.

Body fluids, such as saliva and water from tears in the eyes, would begin to boil due to the low pressure of the lunar vacuum, a phenomenon known as decompression boiling.

This would cause the astronaut to start getting steam from his mouth and eyes. It would be an impressive sight to see.
However, the blood inside the veins would not evaporate instantly thanks to the internal pressure of the blood vessels.
Although initially acting as a barrier, the skin could not contain the expansion of internal gases and would begin to swell as if it were being inflated with an air pump.

As if this were not enough, extreme temperatures could create two scenarios, deep depending on the astronaut’s location. If the astronaut is in the shadow, i.e., not under the sun’s rays, the temperature will be about -274 °F (down to -170 °C); this could freeze the exposed tissues until he becomes a human ice statue.

The second scenario involves the astronaut being in direct sunlight. In this case, the temperature could be up to 248 °F (up to 120 °C), which would scorch the astronaut. Solar radiation breaks down the molecules in the skin and tissues, and after many years, this turns into dust.

After fluids such as saliva and tears evaporate, blood will also begin to evaporate just 10 seconds later.
And in the 15th second, the astronaut would lose consciousness due to lack of oxygen and, in less than two minutes, he would have died.

Suppose life ends occurs under the sun’s rays, such as in the Mare Tranquillitatis, where the first astronauts landed; solar radiation would destroy skin molecules and tissues.
On what planet would we have the least painful end of life?