Voyager Technologies Inc. shares gained as much as 139% in their debut after the company raised $383 million in an upsized US initial public offering.The Denver-based defense contractor’s stock traded at $69.

In this week’s edition of The Prototype, we look at a big space stock IPO, Korea’s plan to dominate the world of robots, building electric motors without metal and more.

Voyager Technologies debuted on the New York Stock Exchange June 11, raising nearly $383 million in an upsized IPO that investors hope will spur more space-focused companies to go public.