astronaut – n. a person who travels in a spacecraft into outer space
capsule – n. a small part of a spacecraft that is separate from the rest of the spacecraft and that is where people live and work
commercial – adj. related to or used in the buying and selling of goods and services
micrometeorites – n. a micrometeoroid that has entered the earth's atmosphere.
spacewalk – n. a task or mission performed by an astronaut outside a spacecraft in space
spacecraft – n. a task or mission performed by an astronaut outside a spacecraft in space