It is not yet possible for people to travel to other planets by.....because the planets are so far away. Therefore, manned space programs today focus on developing safe ways for.......to live and work in space. One way space programs can.....experiments on living and working in space is by putting space stations in orbit.The Russian space station Mir was.....into orbit in 1986, and it stayed up for more than ten years. One astronaut lived.......Mir for 438 days without returning to Earth!