Scientists have recently observed for the first time that, on an epigenetic level, astronauts age more slowly during long-term simulated space travel than they would have if their feet had been planted on Planet Earth.
The difference isn't noticeable though — after spending six months on the ISS, astronauts have aged about 0.005 seconds less than the rest of us.
If that sounds unremarkable, consider this: the mean of the predicted life expectancy for American men born in the same years as the 12 Apollo astronauts is 59.5 years, which means that as a group the surviving spacemen have lived for almost two and a half decades longer than their contemporaries.
Previous research has shown that spending time in space causes bone density loss, immune dysfunction, cardiovascular issues such as stiffening of arteries, and loss of skeletal muscle mass and strength in both humans and rodent models. These changes resemble aging in people age on Earth, but happen more quickly.
Because of its close proximity to the black hole, it experiences tremendous time dilation, with one hour on the faraway planet equaling seven years on Earth.
Scientists have recently observed for the first time that, on an epigenetic level, astronauts age more slowly during long-term simulated space travel than they would have if their feet had been planted on Planet Earth.
Astronaut Thomas Jones said it "carries a distinct odor of ozone, a faint acrid smell…a little like gunpowder, sulfurous." Tony Antonelli, another space-walker, said space "definitely has a smell that's different than anything else." A gentleman named Don Pettit was a bit more verbose on the topic: "Each time, when I ...
It's estimated that the heart, blood vessels, bones, and muscles deteriorate more than 10 times faster in space than by natural aging.
Explanation: The clocks in space tick more slowly than clocks on Earth., HENCE COVERING LESS TIME AS COMPARED TO EARTH IN THE SAME DURATION. One hour on Earth is 0.0026 seconds in space. Thus, upon calculation we find that one hour on Earth is equivalent to seven years in space.
People in a coma will not age like conscious people living life. Muscles weaken & emaciate. The damaged part of the brain might deteriorate as a result of inflammation to the area.
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.
The ISS orbits the earth at speeds of approximately 17,000 miles per hour, which is considerably faster than the earth rotates on its axis. Therefore the solar day on the ISS is considerably shorter than the earth day at just over 90 minutes in duration.
A year in space is dependent on your location. We count a year as the time it takes for the Earth to revolve around the sun once. Jupiter for instance, would have it's own year to orbit the sun, but it would be equivalent to 12 Earth years. If you were from Earth, you would still count Earth years.
Astronauts age a bit slower than those of us on Earth due to something called "time dilation" described by Einstein's theory of relativity.
The first planet they land on is close to a supermassive black hole, dubbed Gargantuan, whose gravitational pull causes massive waves on the planet that toss their spacecraft about. Its proximity to the black hole also causes an extreme time dilation, where one hour on the distant planet equals 7 years on Earth.
The human body can grow up to three percent taller in space – that's about two inches for a six-foot astronaut.
Low gravity is equally probable to extend the lifespan of elderly humans on Mars, especially those born and bred on Earth.
In space we can assume that there would be no external organisms such as insects and fungi to break down the body, but we still carry plenty of bacteria with us. Left unchecked, these would rapidly multiply and cause putrefaction of a corpse on board the shuttle or the ISS.
It turns out that if the universe was infinitely large and infinitely old, then we would expect the night sky to be bright from the light of all those stars. Every direction you looked in space you would be looking at a star. Yet we know from experience that space is black!
No, there isn't sound in space.
This is because sound travels through the vibration of particles, and space is a vacuum. On Earth, sound mainly travels to your ears by way of vibrating air molecules, but in near-empty regions of space there are no (or very, very few) particles to vibrate – so no sound.
1 second in space is equal to 1 second in earth. Space time doesn't move any faster than earth time so we use earth time for all of outer space.
Astronauts need space suits to stay alive. You could only last 15 seconds without a spacesuit — you'd die of asphyxiation or you'll freeze. If there's any air left in your lungs, they will rupture.