Bigelow Aerospace company has also developed a prototype expandable module that will be installed on the International Space Station (ISS) in early 2016.
According to Popular Science, it will be challenging to ensure the module is both lightweight and shields astronauts from radiation.
In a small yet significant to send astronauts to Mars, NASA engineers have alreadly welded together the first two segments of the Orion crew module that will fly atop NASA's Space Launch System (SLS) rocket on a mission beyond the far side of the Moon.
SLS is one of the most experienced large rocket engines in the world, with more than a million seconds of ground test and flight operations time. When completed, SLS will enable astronauts to begin their journey to explore destinations far into the solar system.