Our Place In Space

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Across
  1. 1. a natural satellite that orbits a planet
  2. 5. the time it takes a planet to rotate once on its axis, i.e. 24 hours
  3. 7. System, the Sun and all the objects that orbit around it, including planets, moons, asteroids, meteoroids and comets
  4. 8. a group of millions or billions of stars
  5. 11. any object that orbits another object
  6. 13. sunlight, sunlight that hits the Earth's surface at a high angle, this type of sunlight is more intense and heats the surface more quickly than indirect sunlight
  7. 15. a ball of gas that releases light and heat
  8. 16. model, a model of the Solar System in which Earth is at the centre
  9. 18. satellite, an object that orbits another object and is not man-made
  10. 19. an imaginary line halfway between the North and South Poles
  11. 21. Way, the galaxy in which the Solar System is located
  12. 22. the motion of one object around another because of gravity
  13. 23. a geometric shape that looks like an oval or squashed circle
Down
  1. 2. plane, the imaginary flat surface on which planets orbit the Sun
  2. 3. planet, a planet made up mostly of rock and metal, with a solid surface
  3. 4. planet, a planet made up mostly of gases, such as hydrogen and helium
  4. 6. the time it takes a planet to orbit once around the Sun
  5. 9. satellite, an object that orbits another object and is man-made
  6. 10. a half of the Earth, either north or south of the Equator
  7. 12. an attractive force between any two objects that have mass
  8. 14. a spinning motion
  9. 17. model, a model of the Solar System in which the Sun is at the centre
  10. 20. an imaginary line through an object around which it spins