Watch Space Brothers (2012) HD Full Movie Free on SolarMovie. Watch Space Brothers (2012) online free. As children, two Japanese brothers promise to one day be astronauts and meet each other in space. Ye...As children, two Japanese brothers promise to one day be astronauts and meet each other in space. Years later, the older one has recently lost his job when he remembers that childhood's dream his younger brother is so close to fulfilling.