Abstract: This paper reviews the prospects for the development of commercial hotels in space; it shows that it is increasingly accepted that this could become a lively new field of business within little more than a decade. The key ...

Abstract: In recent years the possibility of developing a space tourism industry has received growing attention since it has the potential to generate a commercial launch market of tens of launches per day—enough to justify investment ...

Abstract: The discrete-element surface roughness model is used to provide insight into the importance of the mean elevation of surface roughness in predicting skin friction over rough surfaces. Comparison ...