For example, like Earth, Mars has seasons, meaning seasonal changes in its atmosphere and weather. But the Martian atmosphere is much thinner than Earth's, meaning atmospheric pressure is so low that the blood of any unprotected visitor would boil.
If you tried to breathe on the surface of Mars without a spacesuit supplying your oxygen – bad idea – you would die in an instant. You would suffocate, and because of the low atmospheric pressure, your blood would boil, both at about the same time.
Instead, you would face another gruesome fate first: your blood, your bile, your eyeballs –will boil furiously, since the low pressure of the vacuum massively reduces the boiling point of water.
"Within minutes the skin and organs would rupture, outgas, and produce a quick, painful death." If not killed by the low-pressure atmosphere, there are many other environmental factors that make Mars inhospitable to humans without protection.
If you were an astronaut on the surface of Mars, and you happened to spill your bottle of drinking water, a very strange thing would happen. The water would instantly freeze and boil away at the same time. On Earth we think of freezing and boiling as two completely different processes, and they are.
Humans could also harvest Martian water for drinking water and breathable air. In some regions where water ice lies just beneath the surface, it might only take a shovel, as demonstrated by Phoenix. But would-be miners beware: a block of harvested ice might be full of impurities that need to be filtered.
The fourth planet from the sun, Mars has geological features like the Earth and moon, such as craters and valleys, many of which were formed through rainfall. Although there is a growing body of evidence that there was once water on Mars, it does not rain there today.
Mars is made up primarily of iron, magnesium, sulfur, acids and CO2. Humans can't breathe on Mars, which is probably a good thing because it stinks. Based on the make-up of the planet and atmosphere, researchers have concluded that Mars smells like rotten eggs.
If you are left on the surface of Mars, you will not decompose as you would here on Earth. If you die during the Martian daytime, your bacteria would begin the normal process of breaking down your body. However, once night hits, your body will freeze and the bacteria will be stopped in its tracks.
Your age on other Planets
You will age slowest on Mercury, Venus and Jupiter as they are slower than Earth. You will age a couple of minutes faster on Mars as it is less massive and has less gravity than Earth.
Other astronauts have described it in similar yet varying ways: "burning metal," "a distinct odor of ozone, an acrid smell," "walnuts and brake pads," "gunpowder" and even "burnt almond cookie." Much like all wine connoisseurs smell something a bit different in the bottle, astronaut reports differ slightly in their " ...
If you do die in space, your body will not decompose in the normal way, since there is no oxygen. If you were near a source of heat, your body would mummify; if you were not, it would freeze. If your body was sealed in a space suit, it would decompose, but only for as long as the oxygen lasted.
This leaves only high-energy blue light to be reflected from our maroon veins. So, if you cut yourself in space, your blood would be a dark-red, maroon color.
It's relatively cool with an average annual temperature of -60 degrees Celsius, but Mars lacks an Earth-like atmospheric pressure. Upon stepping on Mars' surface, you could probably survive for around two minutes before your organs ruptured.
So far, only uncrewed spacecraft have made the trip to the red planet, but that could soon change. NASA is hoping to land the first humans on Mars by the 2030s—and several new missions are launching before then to push exploration forward.
There are no human bodies lost in space. Most spaceflight-related accidents that involved people have happened while still on Earth. The only three people who have died in space are the cosmonauts of the Soyuz 11. The accident occurred during reentry and the capsule landed on Earth so their bodies were recovered.
There would be nothing to cause the body to change, and so it would remain. There would be a slow breaking down of surface proteins, due to UV light, and eventually micrometeorites would erode the body, but these processes would take many millions of years. Save this answer.
Homes on Mars would need to withstand radiation levels, temperature fluctuations, lack of oxygen, and other conditions on Mars. And new environments call for alternative structures. A few possibilities are that humans could live in ice igloos or below the ground surface.
In 1972, scientists were astonished to see pictures from NASA's Mariner 9 mission as it circled Mars from orbit. The photos revealed a landscape full of riverbeds—evidence that the planet once had plenty of liquid water, even though it's dry as a bone today.
Although there is some circumstantial evidence that Mars may be volcanically active, we've never witnessed an eruption. Instead, these plumes are a simple atmospheric phenomenon: clouds. Mars has water vapor just like Earth, which circulates through the Martian atmosphere.
Mars may look hot, but don't let its color fool you -- Mars is actually pretty cold! In orbit, Mars is about 50 million miles farther away from the Sun than Earth. That means it gets a lot less light and heat to keep it warm.
A summer day on Mars may get up to 70 degrees F (20 degrees C) near the equator, but at night the temperature can plummet to about minus 100 degrees F (minus 73 degrees C). NASA's Mars Curiosity rover is giving us new insight into the environment on Mars all the time.
Surface temperatures may reach a high of about 20 °C (293 K; 68 °F) at noon, at the equator, and a low of about −153 °C (120 K; −243 °F) at the poles. Actual temperature measurements at the Viking landers' site range from −17.2 °C (256.0 K; 1.0 °F) to −107 °C (166 K; −161 °F).
If you were standing on Mars, you'd hear a quieter, more muffled version of what you'd hear on Earth, and you'd wait slightly longer to hear it. On Mars, the atmosphere is entirely different. But, the biggest change to audio would be to high-pitch sounds, higher than most voices.