1. The ISS stands for the International Space Station. It is a space station, or a habitable artificial satellite, in low Earth orbit.
-> 1. The ISS stands for the International Space Station, which is a space station, or a habitable artificial satellite, in low Earth orbit.
2. Kjell Lindgren is a NASA astronaut. He is replacing items inside the ISS. →
-> 2. Kiell Lindgren who is replacing items inside the ISS is a NASA astronaut.
3. NASA is an American’ independent agency of the executive branch of the United States federal government. It is responsible for the civilian space program, as well as aeronautics and aerospace research.
-> 3. NASA which is responsible for the civilian space program, as well as aeronautics and aerospace research is an American's independent agency of the excutive branch of the United States federal government.
4. The Skylab was established in the orbit in 1973. The first Apollo Moon landing mission were completed in 1969.
-> 4. By the time the Skylab was established in the orbit in 1973, the first Apollo Moon landing mission had been completed for 4 years.