space

3. Space Station, a space laboratory where astronauts live and running lots of science experiments.
5. also known as The Red Planet.
7. a cloud of gas and dust in space.
10. is a small rock travelling through space.
13. a gigantic collection of stars, along with cosmic gas, dust and other stuff.
14. sometimes a ‘shooting star’.
15. an envelope of blisteringly hot gas surrounding the Sun.
18. chunks of rock and metal left over from when our Solar System formed.
21. the closest planet to our Sun and the smallest planet in the Solar System.
22. clusters, are huge groups of stars bound together by gravity.

1. Year, a unit for measuring distance (like a mile or a kilometre).
2. a force that attracts all objects that have mass.
4. Eclipse, Earth passes between the Moon and the Sun, the Moon becomes completely cloaked in shadow.
6. the biggest planet in our Solar System, over 100 times bigger than Earth.
8. our beautiful home planet; the only place in the Universe where life exists
9. Dust, made up of tiny solid particles in space, sometimes called stardust.
11. Planet, an object in the Solar System that is bigger than a comet or asteroid but smaller than a planet.
12. a layer of gases surrounding a planet or a moon.
13. Disc, spiral galaxies are disc shaped, like a CD with the bulge at the centre.
15. made of ice, dust and rock, so they are sometimes called “dirty snowballs”.
16. a natural satellite that orbits a planet.
17. Hole, form when a massive star dies and is squashed down into an incredibly tiny space.
19. Bang, 14 billion years ago the entire Universe was inside a bubble thousands of times smaller than a pinhead.
20. the path along which cosmic objects, satellites and even spacecraft travels.
21. Way, the galaxy we live within.