Traveling and Living in Space

4. A person who rides in a space vehicle from Russia.
6. Represents a permanent human presence in space: it has been manned with a crew of at least two since November 2, 2000. The space station is located in orbit around the Earth at an altitude of approximately 360 km, a type of orbit usually termed low Earth orbit.
8. Established in 1958 as the government agency responsible for the United States of America’s space program and long-term general aerospace research. A civilian organization, it conducts or oversees research into both civilian and military aerospace systems.
11. A path described by one body in its revolution about another.
12. A rocket-launched spacecraft able to land like an unpowered aircraft, used for journeys between Earth and craft orbiting the Earth.
14. A vehicle, missile, or aircraft which obtains thrust by the reaction to the ejection of fast moving exhaust from within a rocket engine.
15. A quantity with both magnitude and direction, such as velocity, acceleration, thrust, lift, drag, momentum, or torque.
16. A vehicle capable of sustaining a person above the terrestrial atmosphere.

1. A condition in which no acceleration from gravity or other force can be detected. Zero gravity.
2. A vehicle for driving over rough terrain.
3. A chemical mixture that is burned to produce thrust.
5. The informal competition between the United States and the Soviet Union to launch unmanned satellites, send people into space, and land them on the Moon.
7. A person who rides in a space vehicle from the United States.
9. A state of very weak gravity.
10. Spacecraft operated by automatic or remote control, with no crew or personnel.
12. The part of the universe lying outside the limits of the Earth’s atmosphere.
13. A bowl-shaped depression formed in the soft soil of the moon by the impact of a meteorite or other object.