Space

3. one of the independent groups of stars in the universe
4. similar in size to Earth.
6. the planet we live on.
8. The rings we see are made of groups of tiny ringlets that surround Saturn.
10. the curved path through which objects in space move around a planet or star:
12. 'Ice Giant'
15. - a celestial body moving in an elliptical orbit around a star
16. an extremely large, round mass of rock and metal, such as Earth, or of gas, such as Jupiter, that moves in a circular path around the sun or another star
17. the closest planet to the Sun.
18. - A ball of hydrogen gas held together by gravity. The central core of a star is extremely hot and produces energy. Some of this energy is released as visible light, which makes the star glow.
20. a device sent up into space to travel around the earth, used for collecting information or communicating by radio, television, etc.

1. - a system of millions or billions of stars and the solar systems within them, together with gas and dust, held together by gravitational attraction
2. the Red Planet
5. ıt Is the Last Discovered Planet in Our Solar System.
7. relating to the Galaxy or other galaxies
9. The fifth planet and the biggest planet
11. a star that has exploded, strongly increasing its brightness for a few months
13. one of many large rocks that circle the sun
14. System - a collection of planets and their moons in orbit around a star, together with smaller bodies in the form of asteroids, meteoroids, and comets.
19. the amount of the light hitting a surface that it reflects back, especially the surface of a planet or other body in space