space

1. race, competition between the US and the Soviet Union in the 1950s and 60s to be the first to explore space
5. turn or cause to turn quickly
8. an artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication.
9. , a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. (ex : The Milky Way)
11. a creature from a different planet
12. , an important job that someone is sent somewhere to do
14. a celestial body moving in an elliptical orbit round a star.
16. , a usually tubular optical instrument for viewing distant objects
19. a person who has been trained for travelling in space

1. a vehicle used for travel in space (also known as spacecraft or rocket)
2. the force that attracts objects towards one another, makes objects fall toward the earth, or toward some other large object such as a planet or a star
3. A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
4. The curved path of a celestial object or spacecraft round a star, planet, or moon, especially a periodic elliptical revolution.
6. , It stands for National Aeronautics and Space Administration: the US government organization that is responsible for space travel and the scientific study of space
7. move or cause to move in a circle round an axis or centre
8. a natural luminous body visible in the sky especially at night
10. It stands for unidentified flying object: an object seen in the sky that is thought to be a spacecraft from another planet
13. conquest , the act of conquering the empty area outside Earth's atmosphere, where the planets and the stars are
15. an object that moves around the sun, usually at a great distance from it, that is seen on rare occasions from the earth as a bright line in the sky
17. system , the sun and the group of planets that move around it
18. one of many large rocks that circle the sun