At the present time, rockets are used to carry people and payloads into space (Bolonkin 2006). Other than rockets, methods used to reach space speed include the space elevator (Bolonkin 2006, 2007a), tethers (Bolonkin and Cathcart 2007; Bolonkin 2008), the electromagnetic system (Bolonkin 2007b, 2010), and the tube rocket (Bolonkin 2002a). The space elevator for big planets is not technically feasible at the present time; it would require substantial costs for development. In particular, the space elevator concept requires extremely strong nanotubes. Tethers are very complex and would require two artificial bodies. Electromagnetic systems are also complex and expensive. The author has previously discussed several other non-rocket launch methods that are potentially low cost, but which require much additional research. These include cable launchers (Bolonkin 2006), circle launchers (Bolonkin 2002a-f, 2006, 2007a,b, 2008, 2010; Bolonkin and Cathcart 2007) and inflatable towers (Bolonkin 2002g).