Satellites and Space

3. The path a planet takes around a star, or the path that a moon or satellite takes around a planet
5. The family of waves that includes light, infrared, microwaves and radiowaves
11. An orbit where the satellite is over the equator and takes exactly 24 hours to circle the Earth so it is always stays over the same part
12. The amount of matter something is made out of
13. A huge ball of gas that gives out heat and light energy
14. An orbit where a satellite passes over the North and South Poles. It will pass over all parts of the Earth in several orbits
16. A star with planets and other objects orbiting it
17. A large object orbiting a star
18. This planet was first thought to be the centre of the Solar System
19. He made the first detailed observations of the Solar System with in a telescope in 1610

1. An unmanned spacecraft that has cameras and other equipment to find out about other planets
2. Anything that orbits a planet or a moon
4. A satellite made by humans
6. All the galaxies and space between them
7. The unit of force
8. Oval shape of a planet's orbit around the Sun
9. He suggested that the planets moved in ellipses, not circles
10. Millions of stars grouped together
11. The force of attraction between any two objects
15. A space probe that goes into orbit around a planet or moon