A Year in Space

While they are in orbit, and look out back on the Earth, astronauts have a unique perspective on the world. Areas of greater prosperity have a particular characteristic when seen from above...

How something so fun can be so bad for you.

Using data from identical twin astronauts Mark and Scott Kelly, NASA’s twin study is investigating the long-term effects of space travel on the human body. The results will be used to help get humans to Mars.

As Scott Kelly orbits the Earth for an entire year, he misses many of Earth’s pleasures, from the people he left behind, to the comforts of home, to the sound of rain or a cool breeze.

As he heads into space, Scott Kelly must say goodbye to everything he knows and loves.

Follow astronaut Scott Kelly’s record-breaking 12-month mission on the International Space Station, from launch to landing, as NASA charts the effects of long-duration spaceflight by comparing him to his identical twin on Earth, astronaut Mark Kelly.

A huge belt of space debris orbits Earth- a single piece could be fatal for those on the ISS.

Even from its orbit of 249 miles above, Scott Kelly stays connected to the people of Earth with the power of social media. His Twitter feed and Instagram accounts have become world-wide phenomena. #YearinSpace

“So the way you rendezvous with the space craft is you kind of get underneath it and sneak up on it,” says astronaut Mark Kelly. You’re moving through millions of miles of cubic space, traveling at 17,500 miles per hour and your margin of error is just inches.

Scott Kelly isn’t only an astronaut- he’s also a father to two daughters. His eldest, Samantha, recounts what it’s like to have a spaceman for a Dad.

For astronauts, blast off can be an out-of-control experience – strapped into a huge controlled explosion.

Over the course of his year in space, astronaut Scott Kelly will conduct over 400 experiments – everything from fluid dynamics to zero gravity farming. But the primary experiment is on himself -- investigating the long-term effects of space travel on the human body.