Across 2. Any large body that orbits a star in a Solar System. 5. A rocky inner planet, second from the Sun in our Solar System. 7. A rocky body orbiting Earth; it is Earth's only natural satellite. 12. Shape of the Moon as we see it from Earth. (4 Words) 15. Planets in orbit around a star other than our Sun. 16. The galaxy containing our Sun and Solar System. (2 Words) 18. An eclipse where the Moon comes between the Sun and the Earth. (2 Words) 20. A scientist who studies space. 21. A piece of rock or dust that makes a streak of light in the night sky. 22. A body in space that gives out light.

Down 1. An outer planet in the Solar System made mainly from gas. (2 Words) 3. A squashed circle or oval shape. 4. A non-contact force that acts between two masses. 6. An eclipse where all of the Sun is covered by the Moon. (2 Words) 8. The period on one section of the Earth or other planet when it is facing away from the Sun. 9. A collection of stars that make a pattern in the sky. 10. The length of time it takes for a planet to orbit the Sun. 11. The Sun and the planets and other bodies in orbit. (2 Words) 13. A small lump of rock in orbit around the Sun. (2 Words) 14. A rocky inner planet, closest to the Sun in the Solar System. 17. Lumps of rock orbiting the Sun left over from when the Solar System formed. 19. The star at the centre of our Solar System. 20. The imaginary line that the Earth spins around.