Destiny will provide astronauts a year-round, shirtsleeve atmosphere for research in many areas including life sciences, microgravity sciences, Earth science and space science research. The facilities inside the lab are designed to yield a steady stream of findings from hundreds of high-quality science and technology experiments. It is the primary workstation for the United States involvement on the International Space Station. The lab was launched on flight 5A in February 2001.
Destiny comprises three cylindrical sections and two end-cones.
Each end-cone contains a hatch opening through which the astronauts will enter and exit the lab. It will be covered with an insulation blanket to protect the module from the harsh temperatures of outer space. Next, an intermediate debris shield made of material similar to that of bullet proof vests will protect the module against space debris and micrometeoroids. Finally, an aluminum debris shield will be placed over the intermediate debris shield for added protection and to reflect the intense sunlight to reduce the load on the air conditioning system. There are 24 racks inside the laboratory, six on each side.