Space travel is nothing new. The first spaceship with a human was sent up1space in 1961. Since then, people have not only travelled to space, 2many of them have also lived there in space stations for some time.
The Soviet Union (苏联) sent the3space station into space in 1971. This space station was called Salyut I. It 4as a place where people could live while they observed space and did experiments. The first group of astronauts lived there for 23 days. The Soviet Union went on to make six more Salyut space stations. At about the same time, the United States had5own space station, called Skylab.
Astronauts6in these space stations for a short time. However, it wasn't until the late 1980s when the Soviet Union sent the Mir space station that people began to live in space for a7time.
Living in space stations seems to be fun, but astronauts face many problems. One of them8food. All the9on space stations are put together on Earth and sent there by space shuttle. Because the food has to last a long time, a lot of it has to be stored in cans. The space station does not have a fridge, but it has a cool room to keep fruit and vegetables fresh. Astronauts also eat many other foods10dried meat that do not need special care.
