A portable heating appliance used to warm an area or room.

A vehicle (or a compartment of a vehicle) designed to transport, and provide life support for people in space, and during reentry through the Earth's atmosphere

(architecture) A three-dimensional truss, often of steel, forming a rigid, stable structure

(probability theory) The set of all possible outcomes of a game, experiment or other situation.

(mathematics) The vector space generated by all the row vectors of a matrix.

A crewed or robotic spacecraft designed to orbit the Earth

The competition between nations in the field of space exploration.

(mathematics) The vector space which comprises the set of linear functionals of a given vector space.

(mathematics, mathematical analysis, topology) Any set on which a metric is defined, giving a distance between any two elements.

Any scientific discipline concerned with the study of phenomena occurring in space, or with space flight.