Science Keywords

4. The study of the Universe
6. The moon's shadow blocks the sunlight from reaching the Earth
9. Layer of air surrounding the Earth
11. When day and night are of the same length
12. The whole moon's bright side is visible to us
15. Occur twice yearly, during the longest day and longest night
19. Force of attraction between very large objects
20. The Earth's shadow blocks sunlight from reaching the moon
21. Huge group of stars, planets, rocks and dust all moving in relation to each other
22. The part of the sky right above you
23. An asteroid or comet that burns up as it enters the Earth's atmosphere

1. Path followed by one object around another object
2. Everything that exists
3. Bands of coloured light in the night sky
5. Outermost layer of the Sun
7. To do with the Universe
8. Occurs when the sun's light is blocked from reaching the Earth
10. Moons or other (including artificial) objects that orbit planets
13. Band of star constellations around Earth that the sun lines up with once a year
14. An object made of ice, frozen gases and rock that moves round the sun
16. Occur twice daily as a result of the
17. Groups of stars that form a pattern
18. One of the nine objects orbiting around the sun
20. Distance travelled by light in one year