TIME in area may shrink your coronary heart, squash your eyeballs and trigger your blood cells to destroy themselves.
These are simply among the well being circumstances astronauts face and scientists fear that longer area journey may trigger extra points.
From coronary heart shrinking to kidney stones, we have rounded up 5 fairly regarding issues that area can do to your physique.
Coronary heart shrinking
Time in area can shrink your coronary heart, in response to a pretty latest examine on a Nasa astronaut.
Final yr, it was revealed that Nasa astronaut Scott Kelly's coronary heart shrank throughout a 340-day stint on the Worldwide Area Station.
Researchers monitored his coronary heart remotely from Earth and observed it shrink regardless of the astronaut exercising commonly.
His coronary heart did return to regular dimension when he got here again to Earth.
The researchers concluded that area shrinks hearts as a result of the guts does not should pump in opposition to gravity.
That is mentioned to take some pressure off the guts and causes it to lose mass.
Area anemia
Area causes the human physique to destroy its personal crimson blood cells and scientists do not know why.
The unusual phenomenon known as area anemia and new analysis suggests it plagues astronauts even after they return dwelling.
A brand new examine printed in Nature Drugs discovered that area causes the human physique to destroy crimson blood cells at a sooner price than on Earth.
Researchers labored with 14 astronauts over a interval of six months.
Their outcomes confirmed that astronauts had been destroying round three million crimson blood cells each second.
That is 54% increased than the common price right here on Earth.
5 out of the 13 astronauts who had blood drawn after they landed again on Earth had been nonetheless anemic.
After a yr, their crimson blood cell destruction was nonetheless discovered to be increased than in individuals who hadn't been to area.
Based on the examine, the longer an individual stays in area, the longer they are going to be anemic on land.
Squashed eyeballs
It isn't unusual for astronauts to endure from an array of imaginative and prescient and eye issues after spending a sure period of time in area.
That is because of the zero-gravity circumstances of spaceflight, which may trigger physique fluids to construct within the head.
That places strain on the eyeballs and causes a situation referred to as spaceflight-associated neuro-ocular syndrome (SANS).
Different eye points can vary from flattened eyeballs to swollen optic nerves, and dangerous eyesight.
The chance for these points is very excessive for astronauts who spend greater than six months at a time in area.
A physique sucking sleeping bag that pulls fluid away from the pinnacle and down in the direction of the ft is one potential answer for this problem.
Losing bones
Time in area can even weaken human bones.
The Nasa web site explains: "Nasa has discovered that with out Earth’s gravity affecting the human physique, weight-bearing bones lose on common 1% to 1.5% of mineral density monthly throughout spaceflight.
"After returning to Earth, bone loss won't be fully corrected by rehabilitation; nonetheless, their threat for fracture shouldn't be increased."
There's concern that bone loss might be even worse on longer missions, like these deliberate for Mars.
Kidney stones
Astronauts are liable to kidney stones due to points with how bones demineralize from the weightlessness of area.
If a kidney stone will get into the urinary tract it could possibly hinder it and trigger debilitating ache.
It might probably additionally lead to kidney infections and swelling so plenty of Earth primarily based kidney stone victims find yourself in hospital.
Astronauts do not have the choice
Elevated hydration can generally assist to stop the issue however scientists are additionally engaged on different potential therapies.
In different information, Nasa has its eye on eight asteroids which are all set to make a 'shut method' to Earth in January.
Historical life on Mars is one potential rationalization for a latest discovery by Nasa's Curiosity rover.
And, China has constructed an 'synthetic moon' to coach its astronauts for future missions.
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