(astronomy) The real or apparent motion of a star etc. through space.

(mathematics) The path traced by the instantaneous centre of a rotating three-dimensional body moving relative to an inertial frame of reference

A blanket made of a plastic material covered with a reflective metal agent; designed to reduce heat loss from a person's body following trauma, or used on the exterior of a spacecraft for thermal control.

(biology) Any of various biological sciences that deal with living things in a space environment

Alternative letter-case form of space age

The region of space containing objects that an optical system can form images of.

Alternative spelling of n space

The environment encountered by living creatures (and vehicles) in space; especially a lack of atmosphere and gravity

(in an electromagnetic coil) The ratio of the volume occupied by the wire in the winding, or the iron in the core, to the total volume of the winding or the core

The loss of energy of a signal (due to absorption, dispersion etc) as it travels through a medium; measured in decibels