space

3. A fixed or adjustable vane or airfoil affixed longitudinally to an aerodynamically or ballistically designed body for stabilizing purposes.
4. The path of an object moving through space.
6. A vehicle for driving over rough terrain.
11. Fine, greyish dust and soil that covers the surface of the moon. Formed by constant pounding of the surface by impacts, the regolith can be between 2 meters and 20 meters deep.
12. Large, dark plains formed by volcanic eruptions. Latin for "seas," early astronomers thought these dark areas on the moon were filled with water. 16% of the moon's surface is covered in maria.
15. A vector quantity that includes the speed and direction of an object.
16. Spacecraft A vehicle capable of sustaining a person above the terrestrial atmosphere.

1. A quantity with both magnitude and direction, such as velocity, acceleration, thrust, lift, drag, momentum, or torque.
2. A state of very weak gravity.
5. The arrangement of the natural and artificial physical features of an area.
7. A long, narrow valley on the surface of the moon. These grooves or channels can be several kilometers wide and hundreds of kilometers long.
8. In the U.S., a person who rides in a space vehicle.
9. The mechanical coupling of two or more human-made orbiting objects.
10. A chemical mixture that is burned to produce thrust.
11. A rille. Rilles are usually named for the craters they are close to. Example: Rima Cavendish is a rille that runs near the Cavendish crater.
13. The science of getting ships, aircraft, or spacecraft from place to place.
14. The locus of all points in the plane at which the sum of the distances from a fixed pair of points is a given constant.