spacesuit – n. a protective covering with life supporting equipment to make life in space possible for its wearer

decade – n. a period of 10 years

realm – n. an area of activity of interest; a field of influence

analog – adj. involving a device or process in which information is represented by physical amounts

simulation – n. something is made to look or feel like something else

capsule – n. a small container or a small part of a spacecraft

adapt – v. to change behavior in reaction to one's situation