1 “... the construction and continued operation of the primary scientific research facility in Earth orbit. Fulfilling...”

2 “... training was specifically targeted to the Apollo lunar landing missions and the Earth-orbiting Skylab space...”

3 “...This third book of the Gemini mission series focuses on the flight that simulated in Earth orbit...”

4 “... station in Earth orbit? As a means of transporting goods, the shuttle could help supply the parts...”

5 “... and maintenance activities as well, not only in Earth orbit but at locations deeper in space. Originally intended...”

6 “..., Vostock, with a man aboard, was put into orbit round the Earth." Soviet Union cosmonaut Yuri A. Gagarin...”