American astronaut Scott Kelly was recently sent to International Space Station (ISS) under a special year-long mission. As per the mission's plan, Kelly has to spend nearly a year aboard the ISS. Now, the astronaut has spent one month, which means there are 11 months to go.

Kelly's mission began when he was launched from the Baikonur Cosmodrome in Kazakhstan on March 29. The first month of the astronaut on the space station was typical of the 11 that lie ahead. During the last one month, a SpaceX cargo ship arrived at the ISS and delivered 4,300 lbs of equipment and supplies, including a sample of so-called synthetic muscle and a zero-gravity espresso machine, called the ISSpresso.

There are more than 200 experiments that must be tended at any one time aboard the space station, but the most important of all the experiments will be Kelly and Russian cosmonaut Kornienko themselves who have to spend a long time on the ISS.

According to reports, human body was built for the one-g environment of earth, but for long trips like traveling to Mars and beyond, astronauts have to figure out if their body can survive the rigors of zero-g. In the first month on the space station, both the astronauts were submitted to a range of preliminary experiments that tracks their health throughout their stay. The astronauts' eyes have been studied to find out what kinds of effects can be caused by zero-g.

As per space physicians, they already know the answer, which is not favorable, but still they hope that Kelly and Kornienko will help to learn more by providing ways to mitigate the damage. The first month also included some biomedical studies.