0. The spacecraft will orbit / take off the moon before flying back.
1. Scientists do experiments in the space laboratory / countdown.
2. There are three astronauts in the satellite / spacecraft.
3. Astronauts wear headsets / spacesuits so they can walk in space.
4. The countdown clock / panel shows that the spacecraft will take off in two hours.
5. Astronauts collected rocks from the space / crater on the moon.