Earth in Space

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Across
  1. 1. one complete orbit around the Sun
  2. 4. different shapes of the Moon as seen from Earth
  3. 5. a meteoroid that enters Earth’s atmosphere, usually creating a bright streak across the sky as it burns up; a shooting star
  4. 7. path a planet takes around a star, or a moon or artificial satellite takes around a planet
  5. 9. the total or partial obscuring of one celestial body by another
  6. 10. a meteor big enough for part of it to hit the ground
  7. 11. full, dark shadow of an eclipse
  8. 14. model, model of the universe with the Sun at its centre
  9. 15. the time a planet takes to rotate once completely on its own axis
  10. 18. system, the Sun and all the planets, satellites, asteroids, comets and other bodies revolving around it
  11. 19. object in orbit around another larger object
  12. 20. Way, the galaxy in which our solar system is located
  13. 21. on Earth, summer, autumn, winter, spring; caused by the tilt of a planet’s axis
  14. 23. model, model of the universe with Earth at its centre
  15. 25. Earth-like, rocky. The terrestrial planets are Mercury, Venus, Earth and Mars
  16. 26. oval shape
  17. 30. an irregular rocky object in orbit around the Sun between the orbits of Mars and Jupiter
  18. 32. belt, a group of rocks that orbit the Sun in a band between Mars and Jupiter
  19. 33. a ball of ice, dust and rock that orbits the Sun in a highly elliptical orbit
Down
  1. 2. eclipse, when the Earth blocks sunlight from reaching the Moon
  2. 3. force field, invisible field that causes masses to be attracted to each other
  3. 4. roughly spherical ball of rock or gas that orbits (moves around) the Sun. They do not generate their own light.
  4. 5. a small particle or body of rock that orbits the Sun near Earth’s orbit
  5. 6. satellites, satellites placed into orbit by humans
  6. 8. less dense shadow of an eclipse
  7. 12. a scientist who studies the stars, planets and other celestial objects
  8. 13. planet, a small celestial body that is in orbit around the Sun and is nearly round in shape but with insufficient gravity to sweep its orbit clear of other bodies (which is a criterion of being called a planet)
  9. 16. the time a planet takes to revolve once around the Sun
  10. 17. motion, apparent loop-like motion of the planets as seen from Earth
  11. 22. the line connecting the North Pole with the South Pole. Earth rotates around this axis.
  12. 24. relating to the sky or to space
  13. 27. month, the time the Moon takes to complete one orbit of Earth (27.3 days)
  14. 28. giants, the large planets of the outer solar system: Jupiter, Saturn, Uranus, Neptune
  15. 29. eclipse, when the Moon blocks sunlight from reaching Earth
  16. 31. a group of stars which form a recognisable pattern in the night sky