An independent reference system of positioning points in space

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.

The guidance operations needed to launch a spacecraft into orbit or space, navigate in space, and return to Earth or some other body

(mathematics) any curve in three-dimensional space; includes any plane curve as a subset

(informal) Space debris.

Alternative spelling of spacelike

A crystal lattice

(mathematical analysis) A measurable space which has a positive measure defined on its σ-algebra.

The determination of the three-dimensional position and velocity of a spacecraft (relative to a frame of reference)

(mathematics) A half space that does not include the plane that bounds it