On March 1, after 342
days in orbit aboard the International Space Station, astronaut Scott
Kelly will return to Earth with fellow year-in-space partner, cosmonaut
Mikhail Kornienko.
Once they land, scientists will begin analyzing data from the men to
study changes that occurred in their bodies over an extended stay in
space. The things scientists learn about their health will help guide
the planning process for a manned mission to Mars — it’ll take about a
year to get there — in the not-so-distant future. In a first-of-its-kind
study, Scott’s twin brother, former astronaut Mark Kelly, remained on
Earth to serve as a human control for the experiment.
Scientists monitored changes to Kelly's vision, gut bacteria, bone
density, metabolic activity, behavioral health and more. Back on Earth,
his brother also underwent a series of physical and mental tests. It’ll
be another six months to six years before we see published results from
this unique experiment.
Throughout his stay, Scott Kelly invited the world to join him
(virtually) on the ISS, and he provided us with an intimate glimpse of
life in orbit and our planet. He became a household name with regular
updates — from selfies to viral videos — from 249 miles above Earth. The
photo to the left is a selfie Scott Kelly took six months into his
mission on the ISS. Here’s a look back at the finest images from Scott
Kelly’s historic year in space.
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