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2. the second planet from the Sun. It is sometimes called Earth's "sister" or "twin" planet as it is almost as large and has a similar composition
6. the fourth planet from the Sun and the second-smallest planet in the Solar System
7. a small body of matter from outer space that enters the earth's atmosphere and begins to burn
8. A meteor that survives burning in space
9. the eighth planet from the Sun
11. A fixed illuminanice point in the night sky
13. small, rocky objects that orbit the Sun
14. frozen leftovers from the formation of the solar system composed of dust, rock, and ice.
15. A galaxy that does not have the clearly defined shape and structure of typical elliptical, lenticular, or spiral galaxies.
16. a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
17. a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image

1. Natural satellite
3. the sixth planet from the Sun and the second-largest in the Solar System
4. the fifth planet from the Sun and the largest in the Solar System.
5. the seventh planet from the Sun, and has the third-largest diameter in our solar system.
6. the smallest planet in the Solar System and the closest to the Sun
7. A small body that floats through the solar system and turns into a meteor when it enters an atmosphere
10. The planet on which we live
12. an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
16. Star at the center of the solar system that the planets orbit around