Saved from space, lost on Earth, hundreds of moon rocks and other space objects have been lost, destroyed, stolen, or remain unaccounted for.

The void that exists beyond the earth's atmosphere.

Above 120 kilometers or 75 miles, very little atmosphere remains, so objects can continue to move quickly without extra energy.

The space between the planets is not entirely empty because it is filled with the tenuous gas of the solar wind as well as particles of dust.

The space within which the concentration of a pheromone (or any other behaviorally active substance) is at or above threshold concentration.

The active space of a pheromone is, in fact, the signal itself.

The portions of the respiratory tract within the trachea, bronchi, and air passages containing air that does not reach the alveoli (tiny, thin-walled, capillary-rich sacs in the lungs where the exchange of oxygen and carbon dioxide takes place) during breathing: The amount of anatomical dead space is increased by certain lung disorders, such as emphysema.

According to Einstein's theory of gravitation, massive objects in space; such as, stars, cause space to curve and light to bend.

The organization of European countries which is dedicated to the exploration of space research and technology and was founded in 1975 with its headquarters in Paris, France.

A space-based astronomical observing facility, orgiting the earth at an altitude of 610 kilometers/380 miles.

It is constructed of a 2.4 meter/94 inch telescope and four complimentary scientific instruments, which are roughly cylindrical, 13 meters/43 feet long, and four meters/13 feet in diameter, with two large solar panels.

The NASA launch site on Merritt Island, near Cape Canaveral, Florida, used for Apollo and space-shuttle launches.

The first flight to land on the moon (1969) and Skylab, the first orbiting laboratory (1973), were launched from here.

A U.S. government agency for space flight and aeronautical research, founded in 1958 by the National Aeronautics and Space Act.

Its headquarters are in Washington, D.C., and its main installation is at the Kennedy Space Center in Florida.

NASA's early planetary and lunar programs included Pioneer spacecraft from 1958, which gathered data for the later crewed missions, the most famous of which took the first people to the moon in Apollo 11 on July 16-24, 1969.

A room, or an area within a room, set aside to be used as an office space with computer equipment and communications equipment.

Office spaces can be designed for occasional use or for those who work from home to use as their main place of work.

When space weather is bad, dangerous particles abound and so space weather has become a general term for the environmental conditions above the earth's atmosphere: "Space storms include protons and ions, known as galactic cosmic rays (GRCs), raining down at near-light speed from space, and similar particles coming in bursts from the sun, called solar energetic particles (SEPs)."