They would quickly die of asphyxiation due to the lack of air and the astronauts blood would boil because there is very little pressure in space so this would lower the boiling point of your blood causing it to boil quicker at a lower temperature this would also contribute to killing the astronaut.
You would likely die.
An astronaut would be in a sealed spacesuit when out of the spacecraft and standing on the Moon's surface. So he or she would be able to sneeze (within the confines of the spacesuit).
He/she would suffocate and/or freeze.
An astronaut landing on Pluto would need to wear a spacesuit that is not much different from those used now for spacewalks in orbit of Earth.
The spacesuit would depressurize, leaving the person inside the spacesuit (if there is one) no oxygen to breathe, leading to their death.
The astronaut would need to be rescued. There is no way to get back to Earth from orbit in only a spacesuit.
Not without spacesuits, just like the moon. If a person were to walk around Mars, they would freeze to death and die from lack of oxygen. With a spacesuit, an astronaut could walk around on Mars, just like they could walk around the surface of the moon wearing a spacesuit.
Ganymede has 14.6 percent of the gravity of earth. Therefore, if an astronaut weighing 900 kg were on Ganymede, his gravitational pull would be the equivalent of 13.14 kg.
no their is no oxgen and your head would explode
you'd die You would die from the thin atmosphere and extreme temperatures.
There is no oxygen you would die.
I think someone will just freeze to death because it is so cold. Not necessarily, temp on mars can be as high as 70 degrees Fahrenheit.