Something similar will take place when humanity leaves Earth for destinations such as the Moon and Mars – although astronauts ...
"We’re a good 15 years away from going to Mars, not five years as Elon Musk alludes to," former NASA astronaut José Hernández ...
Mars has never been closer than about 34.8 million miles from Earth in recorded history — which means astronauts will be signing onto a round trip journey of around three years, according to NASA.
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