Chinese astronauts complete the first spacewalk outside the Tianhe space station

China has been working hard to get its first full-time orbiting space station up and running. On Saturday, astronauts conducted the first spacewalk outside of the Tianhe space station to install the equipment required for the long-term operation of the space station. The astronauts opened the hatch and exited the space station at 11 PM Eastern on July 3. According …