Space

3. The force that causes objects with mass to attract one another.
4. A vehicle for exploring the surface of an extra terrestrial body (such as the moon and mars.)
7. The whole mass of air surrounding a planet.
9. to move around another object along a circular path.
10. The region between the inner and outer planets where most astroids orbit around the sun.
14. A large artificial satellite used as a long-term base for manned and operations in space.
16. A vehicle or device designed for travel or operation outside earths atmosphere.
18. large and small rocks or metallic masses orbiting the sun; made up of materials similar to those that form for each planets.

1. A Celestial body of ice, dust, and rock with an elongated and elliptical orbit.
2. an unmanned spacecraft designed to explore the solar system and transmit data back to earth.
5. The four largest and brightest moons of Jupiter which were discovered by Galileo Galilei; Ganymede, Lo, Callisto, and Europa.
6. any of the large celestial bodies that revolve around the sun in the solar system.
8. to spin on an axis; The spinning of earth on its axis that causes day and night to occur.
11. The path of an object around a point in space.
12. National Aeronautics and Space Administration; The American government agency dedicated to space exploration.
13. A small object that enters earths atmosphere from space and burns due to friction, admitting light.
15. relating to the land.
17. composition of outer planets whose atmosphere is made of gases.