Space

7. Second biggest planet, also a gas giant and is surrounded with icy rings
8. The planet that can sustain living creatures
9. Scientists that study about space and astronomy
11. The distance which a ray of light would travel in one year. This is about 6,000,000,000,000 (6 trillion) miles.
13. A special kind of elongated circle. The orbits of the solar system planets form ellipses.
15. The star that it is in the centre of the solar system
16. A small particle from a comet or asteroid
17. Seventh planet from the sun

1. Icy small Solar System Body
2. Biggest planet and is a gas giant
3. Second planet closest to the sun
4. A group of stars, gas and dust held together by gravity
5. Minor Planets that are not comets
6. Described as the "Red Planet", named after the Roman God of war
8. When our view of one object in the sky is blocked by either another object or the Earth's shadow
10. An area in the Earth's upper atmosphere which absorbs many of the lethal radiations coming from space
12. Negative particle which orbits an atom
14. A dwarf planet that used to be a part of the solar system
16. Smallest and closest planet to the Sun
18. A cloud of gas and dust