Space

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Across
  1. 2. Empty regions between bodies in the universe.
  2. 3. round space object that travels around a star but has not cleared its own orbit.
  3. 5. The force of attraction between two objects. Keeps all planets in orbit around the sun.
  4. 6. Giant balls of hot gas, giving out huge amounts of heat and light.
  5. 8. A rocky object that orbits a star. Found in the asteroid belt.
  6. 13. skipping a state of matter. E.g. ice changing to a gas.
  7. 15. Name of our galaxy
  8. 17. A meteor that passes through the Earth's atmosphere and hits the Earth.
  9. 18. The amount of matter in an object.
  10. 22. Unit used to measure weight
  11. 23. A planet with large rings.
  12. 24. A device used to observe the universe.
  13. 26. Object composed of dust, rock and metal. Also orginate in the asteroid belt. Some come from mercury or mars.
  14. 27. A body in orbit around a planet.
  15. 28. The nearest planet to the sun.
Down
  1. 1. A natural body outside the Earth's atmosphere.
  2. 4. Everything that exists, including stars, planets, galaxies and empty space.
  3. 7. A group of stars forming a recogisable pattern.
  4. 9. Object composed of frozen gases, rock, dust and has an icy sheel which orbits the sun.
  5. 10. The name of our star.
  6. 11. A person who studies space.
  7. 12. Unit of distance in space.
  8. 14. Collection of many millions of stars, dust, gas and dark matter held together by gravity.
  9. 15. Meteoroid that hits the Earth's atmossphere. Also known as shooting star.
  10. 16. model Ptolemy's model of the universe with the Earth in the centre.
  11. 19. Composed of a star and all the objects orbiting around it.
  12. 20. The largest planet in our solar system.
  13. 21. A large round object that has enough gravity to clear its orbit around the sun.
  14. 25. Mass which takes into account of the force of gravity.