Astronauts' eyes weaken during long space missions, raising concerns for Mars travel
The low levels of gravity (microgravity) in space cause significant changes in astronauts' eyes and vision after six to 12 ...
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Six Planets Parade: Visible with Naked Eye also in Greece, Jan 24-25
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The next frontier? Why space tourism might not be as far-fetched as you think
As companies like SpaceX and Virgin Galactic make waves in space tourism, how long does the rest of the world have to wait ...