Deep Space Travel Revealed To Be Hazardous To Astronauts' Hearts With Current Technology; May Explain Why NASA Never Returned To The Moon [VIDEO]

It was revealed that astronauts whom traveled to the Moon were four times more likely to contract a cardiovascular disease than that of astronauts whose missions were only barely beyond the Earth's atmosphere.

The recently published study revealed that astronauts who have traveled to the Moon were four times likely to contract a heart related disease than those who have just traveled within the Earth's magnetosphere; and five times more likely to die of cardiovascular complications than people who haven't traveled to space at all, according to the Nature Scientific Reports.

It has been discovered that current technology still has a long way to go to protect humans from deep space radiation, not to mention the previously discovered inept technology used by the Apollo Lunar astronauts, in terms of radiation protection.

Astronauts whom conducted missions only within the grasp of the Earth's magnetosphere were significantly safer than those who have traveled beyond the area. It is suspected that the harsh radiation of space were mainly to blame.

Astronauts within the magnetosphere are protected by the Earth's magnetic field against deep-space radiation.

The study explained that deep-space radiation significantly raises the risk of contracting cardiovascular diseases due to the high possibility of cell damage when exposed. The damaged cells would ultimately lead to arterial clogging, The Guardian reported.

Scott Kelly, a NASA astronaut, had just returned to Earth from his 340-day mission aboard the International Space Station back in March of this year.

Kelly served as a test subject, besides his duty at the ISS, which provided researchers invaluable data on the effects of long-term space exploration, albeit the American astronaut remained within the boundaries of the ISS.

The dangers of deep-space travel, and the tenure of exposure to the bare elements showed that with insufficient protection would likely lead to heart failure, as well as blindness, whichever comes first, according to Ars Techinca.

The study is just one of many needed to determine humankind's fate in space exploration. NASA has stated that it is ready to send humans to deep-space by 2020, meanwhile Elon Musk's SpaceX vision is to send people to Mars as soon as 2018.